Compiler bug while serializing enum to JSON value

Error reliably occurs when trying to serialize a tuple-like variant to a JSON value while also using the serde tag macro.

Code

use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize)]
#[serde(tag = "type")]
pub enum Foo {
    Bar,
    Baz(Box<Foo>),         // cause by this line
    Qux { qux: Box<Foo> }, // this construction works fine
}

fn main() {
    println!("{:?}", serde_json::to_value(&Foo::Bar))
}

Error output

thread 'rustc' panicked at /rustc/e71f9a9a98b0faf423844bf0ba7438f29dc27d58/compiler/rustc_type_ir/src/ty_kind.rs:797:17:
type variables should not be hashed: ?0t

Backtrace

stack backtrace:
   0:        0x1122aa598 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h39ba3129e355bb22
   1:        0x10f4e11a4 - core::fmt::write::h8b50d3a0f616451a
   2:        0x11229e734 - std::io::Write::write_fmt::h4b3bbae7048e35f8
   3:        0x1122aa458 - std::sys::backtrace::BacktraceLock::print::h7934b1e389160086
   4:        0x1122ac934 - std::panicking::default_hook::{{closure}}::hbcd636b20f603d1e
   5:        0x1122ac77c - std::panicking::default_hook::ha9081970ba26bc6c
   6:        0x1100f3574 - <alloc[ac3a40a93536e1d0]::boxed::Box<rustc_driver_impl[2efa7699d230cd08]::install_ice_hook::{closure#0}> as core[e750fbdca16b7814]::ops::function::Fn<(&dyn for<'a, 'b> core[e750fbdca16b7814]::ops::function::Fn<(&'a std[5e488047b44b26af]::panic::PanicHookInfo<'b>,), Output = ()> + core[e750fbdca16b7814]::marker::Sync + core[e750fbdca16b7814]::marker::Send, &std[5e488047b44b26af]::panic::PanicHookInfo)>>::call
   7:        0x1122ad200 - std::panicking::rust_panic_with_hook::h9a5dc30b684e2ff4
   8:        0x1122ace3c - std::panicking::begin_panic_handler::{{closure}}::hbcb5de8b840ae91c
   9:        0x1122aaa40 - std::sys::backtrace::__rust_end_short_backtrace::ha657d4b4d65dc993
  10:        0x1122acb00 - _rust_begin_unwind
  11:        0x11498fb2c - core::panicking::panic_fmt::hda207213c7ca0065
  12:        0x110f98864 - <rustc_type_ir[39a3bb626b676030]::ty_kind::InferTy as rustc_data_structures[31414becc4bf50ac]::stable_hasher::HashStable<rustc_query_system[38f10faf24a7a280]::ich::hcx::StableHashingContext>>::hash_stable
  13:        0x110e330e4 - <rustc_type_ir[39a3bb626b676030]::ty_info::WithCachedTypeInfo<rustc_type_ir[39a3bb626b676030]::ty_kind::TyKind<rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt>> as rustc_data_structures[31414becc4bf50ac]::stable_hasher::HashStable<rustc_query_system[38f10faf24a7a280]::ich::hcx::StableHashingContext>>::hash_stable
  14:        0x110f1d614 - <&rustc_middle[b8dd1e411f5154df]::ty::list::RawList<(), rustc_middle[b8dd1e411f5154df]::ty::generic_args::GenericArg> as rustc_data_structures[31414becc4bf50ac]::stable_hasher::HashStable<rustc_query_system[38f10faf24a7a280]::ich::hcx::StableHashingContext>>::hash_stable
  15:        0x110e33048 - <rustc_type_ir[39a3bb626b676030]::ty_info::WithCachedTypeInfo<rustc_type_ir[39a3bb626b676030]::ty_kind::TyKind<rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt>> as rustc_data_structures[31414becc4bf50ac]::stable_hasher::HashStable<rustc_query_system[38f10faf24a7a280]::ich::hcx::StableHashingContext>>::hash_stable
  16:        0x111849110 - <rustc_query_impl[2a0d338f8a3be2df]::query_impl::try_normalize_generic_arg_after_erasing_regions::dynamic_query::{closure#7} as core[e750fbdca16b7814]::ops::function::FnOnce<(&mut rustc_query_system[38f10faf24a7a280]::ich::hcx::StableHashingContext, &rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 8usize]>)>>::call_once
  17:        0x11172a274 - rustc_query_system[38f10faf24a7a280]::query::plumbing::try_execute_query::<rustc_query_impl[2a0d338f8a3be2df]::DynamicConfig<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<rustc_middle[b8dd1e411f5154df]::ty::PseudoCanonicalInput<rustc_middle[b8dd1e411f5154df]::ty::generic_args::GenericArg>, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[2a0d338f8a3be2df]::plumbing::QueryCtxt, true>
  18:        0x11193fdec - rustc_query_impl[2a0d338f8a3be2df]::query_impl::try_normalize_generic_arg_after_erasing_regions::get_query_incr::__rust_end_short_backtrace
  19:        0x110e490f4 - rustc_middle[b8dd1e411f5154df]::query::plumbing::query_get_at::<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<rustc_middle[b8dd1e411f5154df]::ty::PseudoCanonicalInput<rustc_middle[b8dd1e411f5154df]::ty::generic_args::GenericArg>, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 8usize]>>>
  20:        0x1121e4a94 - <&rustc_middle[b8dd1e411f5154df]::ty::list::RawList<(), rustc_middle[b8dd1e411f5154df]::ty::Ty> as rustc_type_ir[39a3bb626b676030]::fold::TypeFoldable<rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[b8dd1e411f5154df]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder>
  21:        0x1121ccd9c - <rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt>::normalize_erasing_late_bound_regions::<rustc_type_ir[39a3bb626b676030]::ty_kind::FnSig<rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt>>
  22:        0x1121940d0 - rustc_ty_utils[7c07dbb7ac500e29]::abi::fn_abi_new_uncached
  23:        0x1121931d0 - rustc_ty_utils[7c07dbb7ac500e29]::abi::fn_abi_of_instance
  24:        0x1117e7ddc - rustc_query_impl[2a0d338f8a3be2df]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0d338f8a3be2df]::query_impl::fn_abi_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 16usize]>>
  25:        0x111839ef4 - <rustc_query_impl[2a0d338f8a3be2df]::query_impl::fn_abi_of_instance::dynamic_query::{closure#2} as core[e750fbdca16b7814]::ops::function::FnOnce<(rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt, rustc_middle[b8dd1e411f5154df]::ty::PseudoCanonicalInput<(rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, &rustc_middle[b8dd1e411f5154df]::ty::list::RawList<(), rustc_middle[b8dd1e411f5154df]::ty::Ty>)>)>>::call_once
  26:        0x1117314c4 - rustc_query_system[38f10faf24a7a280]::query::plumbing::try_execute_query::<rustc_query_impl[2a0d338f8a3be2df]::DynamicConfig<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<rustc_middle[b8dd1e411f5154df]::ty::PseudoCanonicalInput<(rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, &rustc_middle[b8dd1e411f5154df]::ty::list::RawList<(), rustc_middle[b8dd1e411f5154df]::ty::Ty>)>, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[2a0d338f8a3be2df]::plumbing::QueryCtxt, true>
  27:        0x11192e534 - rustc_query_impl[2a0d338f8a3be2df]::query_impl::fn_abi_of_instance::get_query_incr::__rust_end_short_backtrace
  28:        0x1113674cc - rustc_middle[b8dd1e411f5154df]::query::plumbing::query_get_at::<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<rustc_middle[b8dd1e411f5154df]::ty::PseudoCanonicalInput<(rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, &rustc_middle[b8dd1e411f5154df]::ty::list::RawList<(), rustc_middle[b8dd1e411f5154df]::ty::Ty>)>, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 16usize]>>>
  29:        0x111368ee4 - rustc_monomorphize[251167eb6332c168]::mono_checks::abi_check::check_feature_dependent_abi
  30:        0x111359c68 - rustc_monomorphize[251167eb6332c168]::mono_checks::check_mono_item
  31:        0x1117e6314 - rustc_query_impl[2a0d338f8a3be2df]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0d338f8a3be2df]::query_impl::check_mono_item::dynamic_query::{closure#2}::{closure#0}, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 0usize]>>
  32:        0x111833290 - <rustc_query_impl[2a0d338f8a3be2df]::query_impl::check_mono_item::dynamic_query::{closure#2} as core[e750fbdca16b7814]::ops::function::FnOnce<(rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt, rustc_middle[b8dd1e411f5154df]::ty::instance::Instance)>>::call_once
  33:        0x111750ba8 - rustc_query_system[38f10faf24a7a280]::query::plumbing::try_execute_query::<rustc_query_impl[2a0d338f8a3be2df]::DynamicConfig<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[2a0d338f8a3be2df]::plumbing::QueryCtxt, true>
  34:        0x1119466e0 - rustc_query_impl[2a0d338f8a3be2df]::query_impl::check_mono_item::get_query_incr::__rust_end_short_backtrace
  35:        0x11132aa50 - rustc_monomorphize[251167eb6332c168]::collector::items_of_instance
  36:        0x1117e7740 - rustc_query_impl[2a0d338f8a3be2df]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0d338f8a3be2df]::query_impl::items_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 32usize]>>
  37:        0x1118383b4 - <rustc_query_impl[2a0d338f8a3be2df]::query_impl::items_of_instance::dynamic_query::{closure#2} as core[e750fbdca16b7814]::ops::function::FnOnce<(rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt, (rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, rustc_middle[b8dd1e411f5154df]::mir::mono::CollectionMode))>>::call_once
  38:        0x11177b3ac - rustc_query_system[38f10faf24a7a280]::query::plumbing::try_execute_query::<rustc_query_impl[2a0d338f8a3be2df]::DynamicConfig<rustc_query_system[38f10faf24a7a280]::query::caches::DefaultCache<(rustc_middle[b8dd1e411f5154df]::ty::instance::Instance, rustc_middle[b8dd1e411f5154df]::mir::mono::CollectionMode), rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 32usize]>>, false, false, false>, rustc_query_impl[2a0d338f8a3be2df]::plumbing::QueryCtxt, true>
  39:        0x111946d30 - rustc_query_impl[2a0d338f8a3be2df]::query_impl::items_of_instance::get_query_incr::__rust_end_short_backtrace
  40:        0x11132c534 - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  41:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  42:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  43:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  44:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  45:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  46:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  47:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  48:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  49:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  50:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  51:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  52:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  53:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  54:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  55:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  56:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  57:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  58:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  59:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  60:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  61:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  62:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  63:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  64:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  65:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  66:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  67:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  68:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  69:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  70:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  71:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  72:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  73:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  74:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  75:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  76:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  77:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  78:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  79:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  80:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  81:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  82:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  83:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  84:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  85:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  86:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  87:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  88:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  89:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  90:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  91:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  92:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  93:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  94:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  95:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  96:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  97:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  98:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
  99:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 100:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
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 349:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 350:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 351:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 352:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 353:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 354:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 355:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 356:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 357:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 358:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 359:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 360:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 361:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 362:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 363:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 364:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 365:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 366:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 367:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 368:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 369:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 370:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 371:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 372:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 373:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 374:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 375:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 376:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 377:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 378:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 379:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 380:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 381:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 382:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 383:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 384:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 385:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 386:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 387:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 388:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 389:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 390:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 391:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 392:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 393:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 394:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 395:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 396:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 397:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 398:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 399:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 400:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 401:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 402:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 403:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 404:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 405:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 406:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 407:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 408:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 409:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 410:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 411:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 412:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 413:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 414:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 415:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 416:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 417:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 418:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 419:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 420:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 421:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 422:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 423:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 424:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 425:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 426:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 427:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 428:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 429:        0x11132cd5c - rustc_monomorphize[251167eb6332c168]::collector::collect_items_rec
 430:        0x11134ce64 - <rustc_data_structures[31414becc4bf50ac]::sync::parallel::ParallelGuard>::run::<(), rustc_data_structures[31414becc4bf50ac]::sync::parallel::par_for_each_in<rustc_middle[b8dd1e411f5154df]::mir::mono::MonoItem, alloc[ac3a40a93536e1d0]::vec::Vec<rustc_middle[b8dd1e411f5154df]::mir::mono::MonoItem>, rustc_monomorphize[251167eb6332c168]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#1}::{closure#0}>
 431:        0x11136a9a8 - <rustc_session[57d16b23e567c0ef]::session::Session>::time::<(), rustc_monomorphize[251167eb6332c168]::collector::collect_crate_mono_items::{closure#1}>
 432:        0x11132e7ec - rustc_monomorphize[251167eb6332c168]::collector::collect_crate_mono_items
 433:        0x111334704 - rustc_monomorphize[251167eb6332c168]::partitioning::collect_and_partition_mono_items
 434:        0x1117eae08 - rustc_query_impl[2a0d338f8a3be2df]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0d338f8a3be2df]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 24usize]>>
 435:        0x111847c18 - <rustc_query_impl[2a0d338f8a3be2df]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2} as core[e750fbdca16b7814]::ops::function::FnOnce<(rustc_middle[b8dd1e411f5154df]::ty::context::TyCtxt, ())>>::call_once
 436:        0x1116f80b4 - rustc_query_system[38f10faf24a7a280]::query::plumbing::try_execute_query::<rustc_query_impl[2a0d338f8a3be2df]::DynamicConfig<rustc_query_system[38f10faf24a7a280]::query::caches::SingleCache<rustc_middle[b8dd1e411f5154df]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[2a0d338f8a3be2df]::plumbing::QueryCtxt, true>
 437:        0x11193e038 - rustc_query_impl[2a0d338f8a3be2df]::query_impl::collect_and_partition_mono_items::get_query_incr::__rust_end_short_backtrace
 438:        0x10fd148b8 - rustc_codegen_ssa[4895bf4d33b35e9f]::base::codegen_crate::<rustc_codegen_llvm[3a8b9c7ed2c4bd7d]::LlvmCodegenBackend>
 439:        0x10fd03bdc - <rustc_codegen_llvm[3a8b9c7ed2c4bd7d]::LlvmCodegenBackend as rustc_codegen_ssa[4895bf4d33b35e9f]::traits::backend::CodegenBackend>::codegen_crate
 440:        0x11099818c - <rustc_session[57d16b23e567c0ef]::session::Session>::time::<alloc[ac3a40a93536e1d0]::boxed::Box<dyn core[e750fbdca16b7814]::any::Any>, rustc_interface[1134f998fa4a6249]::passes::start_codegen::{closure#0}>
 441:        0x110a5d238 - rustc_interface[1134f998fa4a6249]::passes::start_codegen
 442:        0x110a3f238 - <rustc_interface[1134f998fa4a6249]::queries::Linker>::codegen_and_build_linker
 443:        0x110115994 - <rustc_middle[b8dd1e411f5154df]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[2efa7699d230cd08]::run_compiler::{closure#0}::{closure#1}::{closure#7}, core[e750fbdca16b7814]::result::Result<core[e750fbdca16b7814]::option::Option<rustc_interface[1134f998fa4a6249]::queries::Linker>, rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>
 444:        0x1100b1418 - <rustc_interface[1134f998fa4a6249]::interface::Compiler>::enter::<rustc_driver_impl[2efa7699d230cd08]::run_compiler::{closure#0}::{closure#1}, core[e750fbdca16b7814]::result::Result<core[e750fbdca16b7814]::option::Option<rustc_interface[1134f998fa4a6249]::queries::Linker>, rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>
 445:        0x1100e65f4 - rustc_span[a17b1635b7abad55]::create_session_globals_then::<core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>, rustc_interface[1134f998fa4a6249]::util::run_in_thread_with_globals<rustc_interface[1134f998fa4a6249]::util::run_in_thread_pool_with_globals<rustc_interface[1134f998fa4a6249]::interface::run_compiler<core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>, rustc_driver_impl[2efa7699d230cd08]::run_compiler::{closure#0}>::{closure#1}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}::{closure#0}::{closure#0}>
 446:        0x1100db820 - std[5e488047b44b26af]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[1134f998fa4a6249]::util::run_in_thread_with_globals<rustc_interface[1134f998fa4a6249]::util::run_in_thread_pool_with_globals<rustc_interface[1134f998fa4a6249]::interface::run_compiler<core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>, rustc_driver_impl[2efa7699d230cd08]::run_compiler::{closure#0}>::{closure#1}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>
 447:        0x1100dec20 - <<std[5e488047b44b26af]::thread::Builder>::spawn_unchecked_<rustc_interface[1134f998fa4a6249]::util::run_in_thread_with_globals<rustc_interface[1134f998fa4a6249]::util::run_in_thread_pool_with_globals<rustc_interface[1134f998fa4a6249]::interface::run_compiler<core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>, rustc_driver_impl[2efa7699d230cd08]::run_compiler::{closure#0}>::{closure#1}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e750fbdca16b7814]::result::Result<(), rustc_span[a17b1635b7abad55]::ErrorGuaranteed>>::{closure#1} as core[e750fbdca16b7814]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 448:        0x1122b72c0 - std::sys::pal::unix::thread::Thread::new::thread_start::h4c442fe9db4e4c3f
 449:        0x191fd1f94 - __pthread_joiner_wake

query stack during panic:
#0 [try_normalize_generic_arg_after_erasing_regions] normalizing `core::result::Result<<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde_json::value::ser::Serializer>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as serde::ser::Serializer>::Ok, <serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde_json::value::ser::Serializer>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> as serde::ser::Serializer>::Error>`
#1 [fn_abi_of_instance] computing call ABI of `serde::ser::impls::<impl serde::ser::Serialize for alloc::boxed::Box<Foo>>::serialize::<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde::__private::ser::TaggedSerializer<serde_json::value::ser::Serializer>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>`
end of query stack

reduction:

trait Convert {
    fn convert<S>(&self, serializer: S) -> S::Out
    where
        S: Converter;
}

trait Converter {
    type Out;
}

struct Foo;

impl Convert for Foo {
    fn convert<S>(&self, ser: S) -> S::Out
    where
        S: Converter,
    {
        let value = Box::new(Foo);
        value.convert(ConvertWrap { _d: ser })
    }
}

fn main() {
    Foo.convert(Ser);
}

struct Ser;

impl Converter for Ser {
    type Out = ();
}

impl Convert for Box<Foo> {
    fn convert<S>(&self, serializer: S) -> S::Out
    where
        S: Converter,
    {
        (**self).convert(serializer)
    }
}

struct ConvertWrap<S> {
    _d: S,
}

impl<S> Converter for ConvertWrap<S>
where
    S: Converter,
{
    type Out = S::Out;
}

Slightly reduced

fn convert<S: Converter>() -> S::Out {
    convert2::<ConvertWrap<S>>()
}
fn convert2<S: Converter>() -> S::Out {
    convert::<S>()
}

fn main() {
    convert::<Ser>();
}

trait Converter {
    type Out;
}

struct Ser;

impl Converter for Ser {
    type Out = ();
}

struct ConvertWrap<S> {
    _d: S,
}

impl<S> Converter for ConvertWrap<S>
where
    S: Converter,
{
    type Out = S::Out;
}

As per cargo-bisect-rustc, this used to produce a regular (non-internal) error until #132173 / nightly-2024-11-11

error: reached the recursion limit while instantiating `convert::<ConvertWrap<ConvertWrap<ConvertWrap<ConvertWrap<ConvertWrap<...>>>>>>`
 --> <source>:5:5
  |
5 |     convert::<S>()
  |     ^^^^^^^^^^^^^^
  |

huh, I guess it leaks monomorphizing...?

Note: cyrgani's reproducer and my reproducer give the same ICE, but the original code gave a different ICE.

Error output of my reproducer

error: internal compiler error: compiler/rustc_ty_utils/src/layout.rs:682:13: Layout::compute: unexpected type `_`


thread 'rustc' panicked at compiler/rustc_ty_utils/src/layout.rs:682:13:
Box<dyn Any>
stack backtrace:
   0:     0x78c8a16dc07a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::he089f96442833f67
   1:     0x78c8a1e14d26 - core::fmt::write::h2f210ed4c94745cb
   2:     0x78c8a2d0f7d1 - std::io::Write::write_fmt::h7de08171ab770fb2
   3:     0x78c8a16dbed2 - std::sys::backtrace::BacktraceLock::print::h810fbd31421329e6
   4:     0x78c8a16de477 - std::panicking::default_hook::{{closure}}::hbaad47ed9dc6356d
   5:     0x78c8a16de260 - std::panicking::default_hook::h24e207139139d40a
   6:     0x78c8a084e258 - std[cba35227022cdb8c]::panicking::update_hook::<alloc[304106e3416ed1f2]::boxed::Box<rustc_driver_impl[16f35eaf1f029c02]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x78c8a16decc3 - std::panicking::rust_panic_with_hook::ha9131beeb2ddc506
   8:     0x78c8a0887041 - std[cba35227022cdb8c]::panicking::begin_panic::<rustc_errors[d5ce295924569018]::ExplicitBug>::{closure#0}
   9:     0x78c8a087c226 - std[cba35227022cdb8c]::sys::backtrace::__rust_end_short_backtrace::<std[cba35227022cdb8c]::panicking::begin_panic<rustc_errors[d5ce295924569018]::ExplicitBug>::{closure#0}, !>
  10:     0x78c8a087c213 - std[cba35227022cdb8c]::panicking::begin_panic::<rustc_errors[d5ce295924569018]::ExplicitBug>
  11:     0x78c8a0890f81 - <rustc_errors[d5ce295924569018]::diagnostic::BugAbort as rustc_errors[d5ce295924569018]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x78c8a0e6b1d3 - rustc_middle[c26a501345a63c03]::util::bug::opt_span_bug_fmt::<rustc_span[7c0f9ff7c6ad315d]::span_encoding::Span>::{closure#0}
  13:     0x78c8a0e5027a - rustc_middle[c26a501345a63c03]::ty::context::tls::with_opt::<rustc_middle[c26a501345a63c03]::util::bug::opt_span_bug_fmt<rustc_span[7c0f9ff7c6ad315d]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x78c8a0e5010b - rustc_middle[c26a501345a63c03]::ty::context::tls::with_context_opt::<rustc_middle[c26a501345a63c03]::ty::context::tls::with_opt<rustc_middle[c26a501345a63c03]::util::bug::opt_span_bug_fmt<rustc_span[7c0f9ff7c6ad315d]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x78c89f02dc80 - rustc_middle[c26a501345a63c03]::util::bug::bug_fmt
  16:     0x78c8a240d89f - rustc_ty_utils[2ce8c0a02c3c1407]::layout::layout_of_uncached
  17:     0x78c8a23fd60b - rustc_ty_utils[2ce8c0a02c3c1407]::layout::layout_of
  18:     0x78c8a23fd56a - rustc_query_impl[c4be5ff3108ead09]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c4be5ff3108ead09]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 16usize]>>
  19:     0x78c8a23fc58f - rustc_query_system[bbd277e70cc7f618]::query::plumbing::try_execute_query::<rustc_query_impl[c4be5ff3108ead09]::DynamicConfig<rustc_query_system[bbd277e70cc7f618]::query::caches::DefaultCache<rustc_middle[c26a501345a63c03]::ty::PseudoCanonicalInput<rustc_middle[c26a501345a63c03]::ty::Ty>, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[c4be5ff3108ead09]::plumbing::QueryCtxt, false>
  20:     0x78c8a23fc1a6 - rustc_query_impl[c4be5ff3108ead09]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  21:     0x78c8a2d8b044 - rustc_ty_utils[2ce8c0a02c3c1407]::abi::fn_abi_new_uncached
  22:     0x78c8a2034794 - rustc_ty_utils[2ce8c0a02c3c1407]::abi::fn_abi_of_instance
  23:     0x78c8a203353c - rustc_query_impl[c4be5ff3108ead09]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c4be5ff3108ead09]::query_impl::fn_abi_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 16usize]>>
  24:     0x78c8a20301f0 - rustc_query_system[bbd277e70cc7f618]::query::plumbing::try_execute_query::<rustc_query_impl[c4be5ff3108ead09]::DynamicConfig<rustc_query_system[bbd277e70cc7f618]::query::caches::DefaultCache<rustc_middle[c26a501345a63c03]::ty::PseudoCanonicalInput<(rustc_middle[c26a501345a63c03]::ty::instance::Instance, &rustc_middle[c26a501345a63c03]::ty::list::RawList<(), rustc_middle[c26a501345a63c03]::ty::Ty>)>, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[c4be5ff3108ead09]::plumbing::QueryCtxt, false>
  25:     0x78c8a202fd7a - rustc_query_impl[c4be5ff3108ead09]::query_impl::fn_abi_of_instance::get_query_non_incr::__rust_end_short_backtrace
  26:     0x78c89f72fdce - rustc_monomorphize[456ac3af4fc8f8b8]::mono_checks::check_mono_item
  27:     0x78c8a22c5f60 - rustc_query_impl[c4be5ff3108ead09]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c4be5ff3108ead09]::query_impl::check_mono_item::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 0usize]>>
  28:     0x78c8a22c5873 - rustc_query_system[bbd277e70cc7f618]::query::plumbing::try_execute_query::<rustc_query_impl[c4be5ff3108ead09]::DynamicConfig<rustc_query_system[bbd277e70cc7f618]::query::caches::DefaultCache<rustc_middle[c26a501345a63c03]::ty::instance::Instance, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[c4be5ff3108ead09]::plumbing::QueryCtxt, false>
  29:     0x78c8a22c5510 - rustc_query_impl[c4be5ff3108ead09]::query_impl::check_mono_item::get_query_non_incr::__rust_end_short_backtrace
  30:     0x78c89f71b353 - rustc_monomorphize[456ac3af4fc8f8b8]::collector::items_of_instance
  31:     0x78c8a2073dc4 - rustc_query_impl[c4be5ff3108ead09]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c4be5ff3108ead09]::query_impl::items_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 32usize]>>
  32:     0x78c8a2073634 - rustc_query_system[bbd277e70cc7f618]::query::plumbing::try_execute_query::<rustc_query_impl[c4be5ff3108ead09]::DynamicConfig<rustc_query_system[bbd277e70cc7f618]::query::caches::DefaultCache<(rustc_middle[c26a501345a63c03]::ty::instance::Instance, rustc_middle[c26a501345a63c03]::mir::mono::CollectionMode), rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 32usize]>>, false, false, false>, rustc_query_impl[c4be5ff3108ead09]::plumbing::QueryCtxt, false>
  33:     0x78c8a2073276 - rustc_query_impl[c4be5ff3108ead09]::query_impl::items_of_instance::get_query_non_incr::__rust_end_short_backtrace
  34:     0x78c8a206fc8c - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec::{closure#0}
  35:     0x78c8a29d6d35 - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  36:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  37:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  38:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  39:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  40:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  41:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  42:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  43:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  44:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  45:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  46:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  47:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  48:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  49:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  50:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  51:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  52:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  53:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  54:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  55:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  56:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  57:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
  58:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
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 236:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 237:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 238:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 239:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 240:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 241:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 242:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 243:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 244:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 245:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 246:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 247:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 248:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 249:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 250:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 251:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 252:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 253:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 254:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 255:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 256:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 257:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 258:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 259:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 260:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 261:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 262:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 263:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 264:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 265:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 266:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 267:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 268:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 269:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 270:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 271:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 272:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 273:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 274:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 275:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 276:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 277:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 278:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 279:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 280:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 281:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 282:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 283:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 284:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 285:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 286:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 287:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 288:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 289:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 290:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 291:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 292:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 293:     0x78c8a29d766f - rustc_monomorphize[456ac3af4fc8f8b8]::collector::collect_items_rec
 294:     0x78c8a29d0e21 - rustc_monomorphize[456ac3af4fc8f8b8]::partitioning::collect_and_partition_mono_items
 295:     0x78c8a29cffa4 - rustc_query_impl[c4be5ff3108ead09]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c4be5ff3108ead09]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 24usize]>>
 296:     0x78c8a29cff89 - <rustc_query_impl[c4be5ff3108ead09]::query_impl::collect_and_partition_mono_items::dynamic_query::{closure#2} as core[3b140760090fa97d]::ops::function::FnOnce<(rustc_middle[c26a501345a63c03]::ty::context::TyCtxt, ())>>::call_once
 297:     0x78c8a2d9b73c - rustc_query_system[bbd277e70cc7f618]::query::plumbing::try_execute_query::<rustc_query_impl[c4be5ff3108ead09]::DynamicConfig<rustc_query_system[bbd277e70cc7f618]::query::caches::SingleCache<rustc_middle[c26a501345a63c03]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[c4be5ff3108ead09]::plumbing::QueryCtxt, false>
 298:     0x78c8a2d9b434 - rustc_query_impl[c4be5ff3108ead09]::query_impl::collect_and_partition_mono_items::get_query_non_incr::__rust_end_short_backtrace
 299:     0x78c8a2dda3e0 - <rustc_codegen_llvm[f279edd7c96e6c44]::LlvmCodegenBackend as rustc_codegen_ssa[3ef07e6201b8f5a6]::traits::backend::CodegenBackend>::codegen_crate
 300:     0x78c8a2de2ba4 - <rustc_interface[d49f06094f81b30c]::queries::Linker>::codegen_and_build_linker
 301:     0x78c8a2d52f12 - rustc_interface[d49f06094f81b30c]::passes::create_and_enter_global_ctxt::<core[3b140760090fa97d]::option::Option<rustc_interface[d49f06094f81b30c]::queries::Linker>, rustc_driver_impl[16f35eaf1f029c02]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
 302:     0x78c8a2d6f364 - rustc_interface[d49f06094f81b30c]::interface::run_compiler::<(), rustc_driver_impl[16f35eaf1f029c02]::run_compiler::{closure#0}>::{closure#1}
 303:     0x78c8a2c34251 - std[cba35227022cdb8c]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[d49f06094f81b30c]::util::run_in_thread_with_globals<rustc_interface[d49f06094f81b30c]::util::run_in_thread_pool_with_globals<rustc_interface[d49f06094f81b30c]::interface::run_compiler<(), rustc_driver_impl[16f35eaf1f029c02]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
 304:     0x78c8a2c34708 - <<std[cba35227022cdb8c]::thread::Builder>::spawn_unchecked_<rustc_interface[d49f06094f81b30c]::util::run_in_thread_with_globals<rustc_interface[d49f06094f81b30c]::util::run_in_thread_pool_with_globals<rustc_interface[d49f06094f81b30c]::interface::run_compiler<(), rustc_driver_impl[16f35eaf1f029c02]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[3b140760090fa97d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 305:     0x78c8a2c35caf - std::sys::pal::unix::thread::Thread::new::thread_start::ha07e360225fa3528
 306:     0x78c8a4462a94 - <unknown>
 307:     0x78c8a44efa34 - clone
 308:                0x0 - <unknown>

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.85.0 (4d91de4e4 2025-02-17) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
panicked at /rustc/4d91de4e48198da2e33413efdcd9cd2cc0c46688/compiler/rustc_type_ir/src/ty_kind.rs:808:17:

thread panicked while processing panic. aborting.

@rustbot

@rustbot claim

huh, I guess it leaks monomorphizing...?

Seems fixed by #146096 but not link to here.

Rollup merge of rust-lang#150509 - AprilNEA:fix-137823, r=petrochenkov

Auto merge of #150512 - JonathanBrouwer:rollup-a3xpskp, r=JonathanBro…

Unrolled build for #150509

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Compiler bug while serializing enum to JSON value #137823

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Compiler bug while serializing enum to JSON value #137823

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robotsnowfall commented on Feb 28, 2025

cyrgani commented on Feb 28, 2025

theemathas commented on Mar 1, 2025

moxian commented on Mar 1, 2025

workingjubilee commented on Mar 1, 2025

theemathas commented on Mar 1, 2025

AprilNEA commented on Dec 30, 2025

AprilNEA commented on Dec 30, 2025

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