Compiler panic: 'index out of bounds'

Playpen link: http://is.gd/LITiE8
Example:

use std::collections::HashSet;

fn main() {
    let mut v = Vec::new();
    foo(&mut v);
}

fn foo(h: &mut HashSet<u32>) {
}

Output from playpen:

<anon>:5:9: 5:15 error: mismatched types:
 expected `&mut std::collections::hash::set::HashSet<u32>`,
    found `&mut collections::vec::Vec<_>`
(expected struct `std::collections::hash::set::HashSet`,
    found struct `collections::vec::Vec`) [E0308]
<anon>:5     foo(&mut v);
                 ^~~~~~
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'index out of bounds: the len is 3 but the index is 3', /home/rustbuild/src/rust-buildbot/slave/beta-dist-rustc-linux/build/src/libcollections/vec.rs:1358


playpen: application terminated with error code 101
Program ended.

Happens for me on rustc 1.1.0-nightly (f9e53c7f2 2015-04-24) (built 2015-04-25), and playpen is using beta, so it happens on that as well.

Duplicate of #23583. I’d close the linked issue, though, because this one has minimal example.

stack backtrace:
   1:     0x7f458a441e69 - sys::backtrace::write::h928094d59f02e42euYr
   2:     0x7f458a449c66 - panicking::on_panic::h63ff4dcb77cfcfd8iow
   3:     0x7f458a40bbe2 - rt::unwind::begin_unwind_inner::hdb381b8543316733s3v
   4:     0x7f458a40c9a7 - rt::unwind::begin_unwind_fmt::hcf17bc68f9d21adby2v
   5:     0x7f458a449846 - rust_begin_unwind
   6:     0x7f458a495e84 - panicking::panic_fmt::hfe7d5ac25990b130yKy
   7:     0x7f458a4a020c - panicking::panic_bounds_check::h215216d6195ef019EJy
   8:     0x7f4588512d2e - middle::infer::freshen::TypeFreshener<'a, 'tcx>.TypeFolder<'tcx>::fold_ty::h5b268b4226c40e95sQw
   9:     0x7f45885140d9 - middle::ty_fold::TypeFolder::fold_substs::h11516006423260476848
  10:     0x7f458858653c - middle::traits::select::SelectionContext<'cx, 'tcx>::select::hcb3cbfe0f063ffbcLYP
  11:     0x7f4588583cf5 - middle::traits::fulfill::FulfillmentContext<'tcx>::select::h212762fc4b72bb85WQN
  12:     0x7f458858333b - middle::traits::fulfill::FulfillmentContext<'tcx>::select_where_possible::h90e9b9b285e1bde0aQN
  13:     0x7f4589b9ee48 - check::vtable::select_fcx_obligations_where_possible::h8046b67f72f03a23I0b
  14:     0x7f4589b9ea2a - check::vtable::select_all_fcx_obligations_and_apply_defaults::h91d8c9ca8d40e7ab7Wb
  15:     0x7f4589c2bdd4 - check::check_bare_fn::h56950a2b577630famUn
  16:     0x7f4589c29f22 - check::CheckItemBodiesVisitor<'a, 'tcx>.Visitor<'tcx>::visit_item::h6380ca56bad0b447pRn
  17:     0x7f4589ceadaa - check_crate::closure.38501
  18:     0x7f4589ce6140 - check_crate::h3d2be1a2f2b833642EC
  19:     0x7f458a984798 - driver::phase_3_run_analysis_passes::hb4a5c5398e7ee860tGa
  20:     0x7f458a965e90 - driver::compile_input::h3635371ed416578cQba
  21:     0x7f458aa235d1 - run_compiler::hc7ca7ffdda3bac71F4b
  22:     0x7f458aa20e22 - boxed::F.FnBox<A>::call_box::h3375003542065736186
  23:     0x7f458aa203d9 - rt::unwind::try::try_fn::h12589008938305638456
  24:     0x7f458a4bd588 - rust_try_inner
  25:     0x7f458a4bd575 - rust_try
  26:     0x7f458aa20680 - boxed::F.FnBox<A>::call_box::h9305475706708510069
  27:     0x7f458a448a01 - sys::thread::Thread::new::thread_start::hde1d5c4c7d7f250fT9u
  28:     0x7f4584537373 - start_thread
  29:     0x7f458a0a027c - clone
  30:                0x0 - <unknown>

I ran into the same error when trying to compile datetime 0.1.7 with the current nightly.

$ RUST_BACKTRACE=1 cargo build
   Compiling datetime v0.1.7
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'index out of bounds: the len is 60 but the index is 117', /private/tmp/rust20150518-72266-n7gtuc/src/libcollections/vec.rs:1361

stack backtrace:
   1:        0x10fe31aef - sys::backtrace::write::ha44b3f4df72d371c32r
   2:        0x10fe3a5d0 - panicking::on_panic::h19b50da5ca5e05bauiw
   3:        0x10fdf5945 - rt::unwind::begin_unwind_inner::h0b7205538a0ab840d0v
   4:        0x10fdf674c - rt::unwind::begin_unwind_fmt::h88d3334f8dd63530jZv
   5:        0x10fe3a12c - rust_begin_unwind
   6:        0x10fe8c815 - panicking::panic_fmt::h41ecfe1a10526c59r3B
   7:        0x10fe876a8 - panicking::panic_bounds_check::h1e29ed4cc92cd76ax2B
   8:        0x116649805 - parse::token::get_name::h35e7e5fccea6e44dnZT
   9:        0x116742ef4 - parse::parser::Parser<'a>::lit_from_token::hf58c8962037cb225ZzH
  10:        0x116747f47 - parse::parser::Parser<'a>::parse_lit::h2e50eafa1ebd61ddZDH
  11:        0x116750023 - parse::parser::Parser<'a>::parse_bottom_expr::h9e9a850fefa543e4i9H
  12:        0x116755682 - parse::parser::Parser<'a>::parse_dot_or_call_expr::h05b5aa9a18a416d2iCI
  13:        0x116759c99 - parse::parser::Parser<'a>::parse_prefix_expr::hcdeb32d1451049bax5I
  14:        0x11675a412 - parse::parser::Parser<'a>::parse_binops::he3e0fd996016893ekeJ
  15:        0x11675aee5 - parse::parser::Parser<'a>::parse_assign_expr::h53209e75bf3e1361ckJ
  16:        0x116723861 - parse::parser::Parser<'a>::parse_expr::h9c3b3a2e323926e41RF
  17:        0x11155937e - parse::h2eeaa28acf5ad6604Se
  18:        0x111558b5e - native::h055b9d86463f67cc2aa
  19:        0x114856c43 - ext::base::F.TTMacroExpander::expand::h16589758004100754197
  20:        0x10f75aed8 - ext::expand::expand_expr::closure.66525
  21:        0x10f7586c0 - ext::expand::expand_expr::h205e82f220007a1f9Lb
  22:        0x10f761470 - fold::noop_fold_expr::h15685179544264607782
  23:        0x10f758d1b - ext::expand::expand_expr::closure.66525
  24:        0x10f7586c0 - ext::expand::expand_expr::h205e82f220007a1f9Lb
  25:        0x10f761cb4 - fold::noop_fold_expr::h15685179544264607782
  26:        0x10f758d1b - ext::expand::expand_expr::closure.66525
  27:        0x10f7586c0 - ext::expand::expand_expr::h205e82f220007a1f9Lb
  28:        0x10f7a6557 - ext::expand::expand_block_elts::closure.67187
  29:        0x10f76c359 - ext::expand::expand_block_elts::h1415cb18ccd320f2Mxc
  30:        0x10f7a6172 - ext::expand::expand_block::h7d5c060d19c0744c7wc
  31:        0x10f76bdc1 - ext::expand::expand_and_rename_fn_decl_and_block::h4a7a8fe955c244cab1c
  32:        0x10f7724aa - ext::expand::expand_item_underscore::h264c173708ffb055hbc
  33:        0x10f7c611c - fold::noop_fold_item_simple::h15088194635162742853
  34:        0x10f7c5efe - ptr::P<T>::map::h2926393362253440021
  35:        0x10f770491 - ext::expand::expand_annotatable::hbcf3d8c020636cdb8Hc
  36:        0x10f76c4d9 - ext::expand::expand_item::h4a790b6e8b59cdb7Gac
  37:        0x10f777602 - iter::FlatMap<I, U, F>.Iterator::next::h7298186205452440470
  38:        0x10f777235 - vec::Vec<T>.FromIterator<T>::from_iter::h2720693747523327938
  39:        0x10f772cf6 - ext::expand::expand_item_underscore::h264c173708ffb055hbc
  40:        0x10f7c611c - fold::noop_fold_item_simple::h15088194635162742853
  41:        0x10f7c5efe - ptr::P<T>::map::h2926393362253440021
  42:        0x10f771487 - ext::expand::expand_annotatable::hbcf3d8c020636cdb8Hc
  43:        0x10f76c4d9 - ext::expand::expand_item::h4a790b6e8b59cdb7Gac
  44:        0x10f777602 - iter::FlatMap<I, U, F>.Iterator::next::h7298186205452440470
  45:        0x10f777235 - vec::Vec<T>.FromIterator<T>::from_iter::h2720693747523327938
  46:        0x10f772cf6 - ext::expand::expand_item_underscore::h264c173708ffb055hbc
  47:        0x10f7c611c - fold::noop_fold_item_simple::h15088194635162742853
  48:        0x10f7c5efe - ptr::P<T>::map::h2926393362253440021
  49:        0x10f771487 - ext::expand::expand_annotatable::hbcf3d8c020636cdb8Hc
  50:        0x10f76c4d9 - ext::expand::expand_item::h4a790b6e8b59cdb7Gac
  51:        0x10f7cda05 - ext::expand::expand_crate::hb3a4d686dfcac529E9c
  52:        0x10c91d5d5 - driver::phase_2_configure_and_expand::closure.20416
  53:        0x10c8d00ae - driver::phase_2_configure_and_expand::h6e78b7cbbae1e1ccYsa
  54:        0x10c8c0369 - driver::compile_input::hd0ddbf75d3cab180Qba
  55:        0x10c97cf63 - run_compiler::hc7fc80763a6a7ff875b
  56:        0x10c97a6ca - boxed::F.FnBox<A>::call_box::h10164488635330116687
  57:        0x10c979c27 - rt::unwind::try::try_fn::h2426084354629403706
  58:        0x10fec0458 - rust_try_inner
  59:        0x10fec0445 - rust_try
  60:        0x10c979efd - boxed::F.FnBox<A>::call_box::h15095568843964241812
  61:        0x10fe391bd - sys::thread::Thread::new::thread_start::h6ac7556a78cca2c6Hlv
  62:     0x7fff94422898 - _pthread_body
  63:     0x7fff94422729 - _pthread_start

rustc 1.2.0-nightly (8b7c17d 2015-05-17) (built 2015-05-18)
OS X 10.9.5

@jirutka

@jirutka

Different error.

Prevent coercions from polluting the fulfillment context

I get this same error, right after I added serde_macros to my Cargo.toml.

❯ RUST_BACKTRACE=1 cargo build                                                                                                                                                                                                                                         [32/4241]
   Compiling serde_codegen v0.4.2
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
thread 'rustc' panicked at 'index out of bounds: the len is 92 but the index is 529', ../src/libcollections/vec.rs:1362

stack backtrace:
   1:        0x10a1ae485 - sys::backtrace::write::ha69861d01c280e10Vns
   2:        0x10a1b6be3 - panicking::on_panic::he1db6e7d5ec9c9022Fw
   3:        0x10a172af2 - rt::unwind::begin_unwind_inner::h9f73b873795fcd2deow
   4:        0x10a173849 - rt::unwind::begin_unwind_fmt::h3999b4670fb43708knw
   5:        0x10a1b676c - rust_begin_unwind
   6:        0x10a20ae35 - panicking::panic_fmt::he89ea3094b3178e919B
   7:        0x10a2055b5 - panicking::panic_bounds_check::h8058af339f14343278B
   8:        0x10f375347 - util::interner::StrInterner::get::h33e23c9881d31a76Fpa
   9:        0x10ba9b224 - parse::token::get_name::hc8e6f23ae3b0497cwaT
  10:        0x10ba9b398 - parse::token::get_ident::h623c49ac14f4e12cNaT
  11:        0x10ba9b34c - str::ast..Ident.ToInternedString::to_interned_string::h226749af2201972apgd
  12:        0x10ba464b4 - lit::LitBuilder<F>::str::h2287811883313644798
  13:        0x10ba463f5 - expr::ExprBuilder<F>::str::h15103756226570193947
  14:        0x10ba46143 - mk_ident::h76e644649ecee0d6Yia
  15:        0x10ba4edb7 - expr_mk_token::h530e0aaf1ac4f9c2Cla
  16:        0x10ba53578 - statements_mk_tt::ha8ed870f505b201bBAa
  17:        0x10ba5bf8e - statements_mk_tt::closure.5782
  18:        0x10ba5bf1d - iter::FlatMap<I, U, F>.Iterator::next::closure.5777
  19:        0x10ba5be7d - option::Option<T>::map::h992756666428157757
  20:        0x10ba5bc0d - iter::FlatMap<I, U, F>.Iterator::next::h16461546956636534358
  21:        0x10ba5b9bd - iter::Chain<A, B>.Iterator::next::h15790673721037698405
  22:        0x10ba5b8a1 - iter::Chain<A, B>.Iterator::next::h13883406854348817918
  23:        0x10ba5cf34 - vec::Vec<T>::extend_desugared::h14308067113245803033
  24:        0x10ba5b561 - vec::Vec<T>.FromIterator<T>::from_iter::h4567733303014666736
  25:        0x10ba5b0db - iter::Iterator::collect::h15870988852878513640
  26:        0x10ba5449f - statements_mk_tt::ha8ed870f505b201bBAa
  27:        0x10ba4071d - statements_mk_tts::hf5a22e049c2a847cZJa
  28:        0x10ba228c2 - expand_tts::h4a76f356700220c2QKa
  29:        0x10ba3bacb - expand_parse_call::h847fdc0375aa33afHMa
  30:        0x10ba3cc23 - expand_quote_expr::hb1131b5a4ef58447Oba
  31:        0x10edf4bbe - ext::base::F.TTMacroExpander::expand::h16772666232880655435
  32:        0x107c39e8b - ext::expand::expand_expr::closure.64675
  33:        0x107c35510 - ext::expand::expand_expr::h99495f0a4050bb0eO3a
  34:        0x107c8e7de - ext::expand::expand_block_elts::closure.65395
  35:        0x107c8cb3e - ext::expand::expand_block_elts::closure.65376
  36:        0x107c48b8a - ext::expand::expand_block_elts::hae5d90e0cb6f3badrPb
  37:        0x107c8c552 - ext::expand::expand_block::h19a07d5850d44ec3MOb
  38:        0x107c3eb93 - fold::noop_fold_expr::h13944231768787436517
  39:        0x107c35712 - ext::expand::expand_expr::closure.64675
  40:        0x107c35510 - ext::expand::expand_expr::h99495f0a4050bb0eO3a
  41:        0x107c88130 - ext::expand::expand_arm::h362881c67b77a2bf5Jb
  42:        0x107c3e7d7 - fold::noop_fold_expr::h13944231768787436517
  43:        0x107c35712 - ext::expand::expand_expr::closure.64675
  44:        0x107c35510 - ext::expand::expand_expr::h99495f0a4050bb0eO3a
  45:        0x107c8e7de - ext::expand::expand_block_elts::closure.65395
  46:        0x107c8cb3e - ext::expand::expand_block_elts::closure.65376
  47:        0x107c48b8a - ext::expand::expand_block_elts::hae5d90e0cb6f3badrPb
  48:        0x107c8c552 - ext::expand::expand_block::h19a07d5850d44ec3MOb
  49:        0x107c4855c - ext::expand::expand_and_rename_fn_decl_and_block::h2f6d7bbfc095110aQic
  50:        0x107cb4677 - ext::expand::expand_and_rename_method::h146aa2e4f3025329akc
  51:        0x107cb963d - ext::expand::expand_impl_item::closure.65794
  52:        0x107cb5f05 - ext::expand::expand_impl_item::h624cadcd858560f3zfc
  53:        0x107c4c2ea - ext::expand::expand_annotatable::hd1384fdfcaa7365bNZb
  54:        0x107c5b91f - ext::expand::MacroExpander<'a, 'b>.Folder::fold_impl_item::h3c6c8bcc8f2aea45Gnc
  55:        0x107c5b39c - iter::FlatMap<I, U, F>.Iterator::next::h2176610863638934878
  56:        0x107c5b6c6 - vec::Vec<T>::extend_desugared::h3745718402942750841
  57:        0x107c5a3d7 - iter::Iterator::collect::h15651229304304986698
  58:        0x107c50e93 - ext::expand::expand_item_underscore::hc68401b64125c559Vsb
  59:        0x107cb3744 - fold::Folder::fold_item_simple::h6115586095879100014
  60:        0x107cb3313 - ptr::P<T>::map::h8648109792104747851
  61:        0x107c4cfcd - ext::expand::expand_annotatable::hd1384fdfcaa7365bNZb
  62:        0x107c48d11 - ext::expand::expand_item::h544d5c924b5556adksb
  63:        0x107c55c0a - iter::FlatMap<I, U, F>.Iterator::next::h10402144123647243192
  64:        0x107c54b17 - vec::Vec<T>.FromIterator<T>::from_iter::h2531848258214199605
  65:        0x107c542df - fold::noop_fold_mod::h11533148739362704925
  66:        0x107c5028e - ext::expand::expand_item_underscore::hc68401b64125c559Vsb
  67:        0x107cb3744 - fold::Folder::fold_item_simple::h6115586095879100014
  68:        0x107cb3313 - ptr::P<T>::map::h8648109792104747851
  69:        0x107c4da4d - ext::expand::expand_annotatable::hd1384fdfcaa7365bNZb
  70:        0x107c48d11 - ext::expand::expand_item::h544d5c924b5556adksb
  71:        0x107c612e4 - iter::FlatMap<I, U, F>.Iterator::next::h4604195285113091658
  72:        0x107c60357 - util::small_vector::SmallVector<T>.FromIterator<T>::from_iter::h15534074357520757775
  73:        0x107c5f1fb - ext::expand::expand_item_mac::h42d76a4eac0c1d4bmvb
  74:        0x107c4c9d7 - ext::expand::expand_annotatable::hd1384fdfcaa7365bNZb
  75:        0x107c48d11 - ext::expand::expand_item::h544d5c924b5556adksb
  76:        0x107c55c0a - iter::FlatMap<I, U, F>.Iterator::next::h10402144123647243192
  77:        0x107c54b17 - vec::Vec<T>.FromIterator<T>::from_iter::h2531848258214199605
  78:        0x107c542df - fold::noop_fold_mod::h11533148739362704925
  79:        0x107c5028e - ext::expand::expand_item_underscore::hc68401b64125c559Vsb
  80:        0x107cb3744 - fold::Folder::fold_item_simple::h6115586095879100014
  81:        0x107cb3313 - ptr::P<T>::map::h8648109792104747851
  82:        0x107c4da4d - ext::expand::expand_annotatable::hd1384fdfcaa7365bNZb
  83:        0x107c48d11 - ext::expand::expand_item::h544d5c924b5556adksb
  84:        0x107cbc9ef - ext::expand::expand_crate::he8ff7220990af98elrc
  85:        0x106693aa2 - driver::phase_2_configure_and_expand::closure.21445
  86:        0x106648bd2 - driver::phase_2_configure_and_expand::h154d7c2f9d5ff029ita
  87:        0x10663844d - driver::compile_input::hb76410fc800a2a41Tba
  88:        0x1067123af - run_compiler::hd724b5fef3441688y7b
  89:        0x10670fc63 - boxed::F.FnBox<A>::call_box::h16633087113713113418
  90:        0x10670f427 - rt::unwind::try::try_fn::h14742554275296927735
  91:        0x10a2430f8 - rust_try_inner
  92:        0x10a2430e5 - rust_try
  93:        0x10a1a09a5 - rt::unwind::try::inner_try::h2041d75ee62fcacd7jw
  94:        0x10670f658 - boxed::F.FnBox<A>::call_box::h11995599304104652074
  95:        0x10a1b566d - sys::thread::Thread::new::thread_start::hb06fec4578e7b89frIv
  96:     0x7fff95ccd2fb - _pthread_body
  97:     0x7fff95ccd278 - _pthread_start

refactor autoderef to avoid registering obligations

Is this the same issue as #31964?

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Compiler panic: 'index out of bounds' #24819

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Compiler panic: 'index out of bounds' #24819

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nagisa commented on Apr 26, 2015

jirutka commented on May 17, 2015

arielb1 commented on Jun 15, 2015

evadnoob commented on Jul 1, 2015

apasel422 commented on May 26, 2016

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