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Incremental occasionally causes link failures (in particular when build process is interrupted) #81280

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Incremental occasionally causes link failures (in particular when build process is interrupted)#81280
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A-contributor-roadblockArea: Makes things more difficult for new or seasoned contributors to RustA-incr-compArea: Incremental compilationA-linkageArea: linking into static, shared libraries and binariesC-bugCategory: This is a bug.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

Description

@jyn514
jyn514
opened on Jan 22, 2021

I tried this code: b717882

I expected to see this happen: It compiles successfully.

Instead, this happened:

  = note: /usr/bin/ld: /tmp/rustc7n3dgo/librustc_typeck-c1c702f6c0ed082b.rlib(rustc_typeck-c1c702f6c0ed082b.1f6gvdzw1xg6y56.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.e321930b0bae74a5b269c2d224f94109.135.llvm.15012941867981504210' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_typeck-c1c702f6c0ed082b.rlib(rustc_typeck-c1c702f6c0ed082b.2kv783dkfz4eig4n.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `_ZN4core3ops8function6FnOnce9call_once17hb43433e1ee944fe7E.llvm.14317370391725333118' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_typeck-c1c702f6c0ed082b.rlib(rustc_typeck-c1c702f6c0ed082b.3cqtg0ebrql2rd8.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.eae49e7385ecc193ec1fcf539c5141a9.100.llvm.5499732698529515802' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.29ntjh109p85p91e.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.712e2f39c61ddadde64034dfaf0f738c.199.llvm.18382006748427464360' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.38uvgcbj494cplao.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.712e2f39c61ddadde64034dfaf0f738c.199.llvm.18382006748427464360' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.3hr9th0q5c43xr2a.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.82495b045438102480b0340cffb3c8e7.100.llvm.17830998827333553218' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.44bsww8uk85mfq3a.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.712e2f39c61ddadde64034dfaf0f738c.199.llvm.18382006748427464360' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.4iywqxra088mgqr5.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.712e2f39c61ddadde64034dfaf0f738c.389.llvm.18382006748427464360' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.4s1s3wicvbdoxsru.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.f6101ecacd895ad87283c593f614ce01.72.llvm.3245620587429400994' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.5fsy1y6w5w7prvy9.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.712e2f39c61ddadde64034dfaf0f738c.199.llvm.18382006748427464360' can not be used when making a shared object
          /usr/bin/ld: /tmp/rustc7n3dgo/librustc_middle-83b74242a7255742.rlib(rustc_middle-83b74242a7255742.zjtxsb10gpjb46g.rcgu.o): relocation R_X86_64_PC32 against undefined hidden symbol `anon.82495b045438102480b0340cffb3c8e7.100.llvm.17830998827333553218' can not be used when making a shared object
          /usr/bin/ld: final link failed: nonrepresentable section on output
          clang: error: linker command failed with exit code 1 (use -v to see invocation)

Meta

rustc --version:

rustc 1.50.0-beta.1 (05b602367 2020-12-29)

cc @Aaron1011 , I think you were looking into something similar a while back.

Activity

  1. jyn514
    added
    A-linkageArea: linking into static, shared libraries and binaries
    T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
    A-incr-compArea: Incremental compilation
    C-bugCategory: This is a bug.
    A-contributor-roadblockArea: Makes things more difficult for new or seasoned contributors to Rust
    on Jan 22, 2021

  2. petrochenkov commented on Dec 24, 2021

    @petrochenkov
    petrochenkov
    on Dec 24, 2021
    Contributor

    Just got this error while linking rustc_driver with incremental enabled (not for the first time).

      = note: ld.lld: error: undefined symbol: anon.91c2f56426c5022640e519f02889d07d.8.llvm.746630307250149404
          >>> referenced by C:\msys64\home\we\rust\library\core\src/option.rs:0
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.1brnvk2mjzqx5b9n.rcgu.o):(rustc_resolve::macros::registered_idents)
          >>> referenced by C:\msys64\home\we\rust\library\alloc\src\vec/mod.rs:425
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.2u8t3u4aqh8idzl4.rcgu.o):(<rustc_resolve::late::lifetimes::LifetimeContext>::with::<<rustc_resolve::late::lifetimes::LifetimeContext>::visit_fn_like_elision::{closure#9}>)
          >>> referenced by C:\msys64\home\we\rust\library\alloc\src\vec/mod.rs:425
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.2u8t3u4aqh8idzl4.rcgu.o):(<rustc_resolve::late::lifetimes::LifetimeContext>::with::<<rustc_resolve::late::lifetimes::LifetimeContext>::visit_segment_args::{closure#6}>)
          >>> referenced 30 more times

          ld.lld: error: undefined symbol: anon.91c2f56426c5022640e519f02889d07d.9.llvm.746630307250149404
          >>> referenced by C:\msys64\home\we\rust\library\alloc\src\vec/mod.rs:425
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.2u8t3u4aqh8idzl4.rcgu.o):(<rustc_resolve::late::lifetimes::LifetimeContext>::with::<<rustc_resolve::late::lifetimes::LifetimeContext>::visit_fn_like_elision::{closure#9}>)
          >>> referenced by C:\msys64\home\we\rust\library\alloc\src\vec/mod.rs:425
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.2u8t3u4aqh8idzl4.rcgu.o):(<rustc_resolve::late::lifetimes::LifetimeContext>::with::<<rustc_resolve::late::lifetimes::LifetimeContext>::visit_segment_args::{closure#6}>)
          >>> referenced by C:\msys64\home\we\rust\library\alloc\src\vec/mod.rs:425
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.2u8t3u4aqh8idzl4.rcgu.o):(<rustc_resolve::late::lifetimes::LifetimeContext>::with::<<rustc_resolve::late::lifetimes::LifetimeContext>::visit_segment_args::{closure#7}>)
          >>> referenced 30 more times

          ld.lld: error: undefined symbol: core::ptr::drop_in_place::<rustc_span::FileName> (.llvm.1438190246702246187)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:188
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.3bc39m1okvl6wof.rcgu.o):(<&mut <rustc_resolve::Resolver>::check_unused::{closure#0} as core::ops::function::FnMut<(&rustc_span::span_encoding::Span,)>>::call_mut)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:0
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.3bc39m1okvl6wof.rcgu.o):(<&mut <rustc_resolve::Resolver>::check_unused::{closure#0} as core::ops::function::FnMut<(&rustc_span::span_encoding::Span,)>>::call_mut)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:188
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.4391tludo7n7dv8i.rcgu.o):(core::ptr::drop_in_place::<rustc_span::SpanSnippetError>)
          >>> referenced 9 more times

          ld.lld: error: undefined symbol: core::ptr::drop_in_place::<(rustc_span::FileName, rustc_span::BytePos)> (.llvm.1438190246702246187)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:188
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.3bc39m1okvl6wof.rcgu.o):(<&mut <rustc_resolve::Resolver>::check_unused::{closure#0} as core::ops::function::FnMut<(&rustc_span::span_encoding::Span,)>>::call_mut)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:188
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.4391tludo7n7dv8i.rcgu.o):(core::ptr::drop_in_place::<rustc_span::SpanSnippetError>)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:188
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.5327cotcw21h0vj4.rcgu.o):(core::ptr::drop_in_place::<core::result::Result<alloc::string::String, rustc_span::SpanSnippetError>>)
          >>> referenced 2 more times
          collect2.exe: error: ld returned 1 exit status

  3. petrochenkov commented on Dec 24, 2021

    @petrochenkov
    petrochenkov
    on Dec 24, 2021
    Contributor

    cc #85309 #86049

  4. petrochenkov commented on Dec 24, 2021

    @petrochenkov
    petrochenkov
    on Dec 24, 2021
    Contributor

    Again:

      = note: ld.lld: error: undefined symbol: anon.26f7d47336e30322871c53dc21221119.123.llvm.9120153389878088914
          >>> referenced by compiler\rustc_codegen_llvm\src/declare.rs:123
          >>>               librustc_codegen_llvm-d0298bfe4a8d31a6.rlib(rustc_codegen_llvm-d0298bfe4a8d31a6.4tgytcm0fnpf9ska.rcgu.o):(rustc_codegen_ssa::base::maybe_create_entry_wrapper::<rustc_codegen_llvm::builder::Builder>)
          >>> referenced by compiler\rustc_codegen_llvm\src/declare.rs:76
          >>>               librustc_codegen_llvm-d0298bfe4a8d31a6.rlib(rustc_codegen_llvm-d0298bfe4a8d31a6.4tgytcm0fnpf9ska.rcgu.o):(rustc_codegen_ssa::base::maybe_create_entry_wrapper::<rustc_codegen_llvm::builder::Builder>)

          ld.lld: error: undefined symbol: <core::iter::adapters::map::Map<core::ops::range::Range<usize>, <rustc_metadata::rmeta::Lazy<[rustc_ast::ast::Attribute], usize>>::decode<(rustc_metadata::creader::CrateMetadataRef, &rustc_session::session::Session)>::{closure#0}> as core::iter::traits::iterator::Iterator>::try_fold::<(), core::iter::traits::iterator::Iterator::find::check<rustc_ast::ast::Attribute, <rustc_resolve::Resolver>::legacy_const_generic_args::{closure#0}::{closure#0}>::{closure#0}, core::ops::control_flow::ControlFlow<rustc_ast::ast::Attribute>>
          >>> referenced by C:\msys64\home\we\rust\library\core\src\iter\traits/iterator.rs:2463
          >>>               librustc_resolve-fac19ceb16326411.rlib(rustc_resolve-fac19ceb16326411.38k7y9bat2xg6222.rcgu.o):(<rustc_resolve::Resolver>::legacy_const_generic_args::{closure#0})

          ld.lld: error: undefined symbol: core::ptr::drop_in_place::<alloc::boxed::Box<rustc_ast::ast::Expr>> (.llvm.12350409468421822947)
          >>> referenced by C:\msys64\home\we\rust\library\core\src\ptr/mod.rs:0
          >>>               librustc_codegen_ssa-d1f61af6eec07775.rlib(rustc_codegen_ssa-d1f61af6eec07775.tftlaxklz1dark3.rcgu.o):(core::ptr::drop_in_place::<rustc_ast::ast::ExprKind>)
          collect2.exe: error: ld returned 1 exit status


error: could not compile `rustc_driver` due to previous error

  5. RalfJung commented on Feb 6, 2023

    @RalfJung
    RalfJung
    on Feb 6, 2023
    Member

    This is particularly likely to happen when the build process is interrupted, e.g. via Ctrl-C

  6. RalfJung
    changed the title [-]Incremental occasionally causes link failures[/-] [+]Incremental occasionally causes link failures (in particular when build process is interrupted)[/+] on Feb 6, 2023

  7. RalfJung commented on Nov 28, 2023

    @RalfJung
    RalfJung
    on Nov 28, 2023
    Member

    I'm running into the Ctrl-C issue fairly regularly. It's quite frustrating when a simple ./x.py fmt is blocked on a long-running build job but one can't cancel the build job since that poisons the cache in really hard to fix ways... and the chances of getting a poisoned cache when doing Ctrl-C while rustc is being built are very high.

    Cc @rust-lang/wg-incr-comp is there anything that can be done to make rustc be "Ctrl-C safe", or least not as blatantly "Ctrl-C unsafe" as it is today?

  8. michaelwoerister commented on Nov 28, 2023

    @michaelwoerister
    michaelwoerister
    on Nov 28, 2023
    Member

    We could start to collect some data on what the root cause might be:

    • Does the interruption have to happen while the linker is running for this to occur?
    • Does this only happen when optimizations & ThinLTO are enabled?

  9. RalfJung commented on Nov 28, 2023

    @RalfJung
    RalfJung
    on Nov 28, 2023
    Member

    Does the interruption have to happen while the linker is running for this to occur?

    When does the linker run?

    I have this occur regularly when I interrupt while half a dozen rustc_ crates are still being built. I think the linker only runs once at the end for the main rustc binary? If that is the case, then the answer to this question is "no".

  10. michaelwoerister commented on Dec 4, 2023

    @michaelwoerister
    michaelwoerister
    on Dec 4, 2023
    Member

    Yes, that sounds right.

    Incr. comp. protects itself against cache corruption by writing everything to a temporary session directory and only when things have reached a valid state, it will "commit" that directory, so it will be used by subsequent compilation sessions. One cause for the problem might be that rustc declares the state to be valid too early, e.g. while LLVM or rustc itself are still in the process of writing files to disk. Or that the interruption is not recognized as a failure and a half-written object file or LLVM bitcode file is cached.

    I'm wondering if we can narrow down where exactly the interruption needs to happen for this to occur.

  11. saethlin commented on Sep 21, 2024

    @saethlin
    saethlin
    on Sep 21, 2024
    Member

    Are people still running into this? I'm trying to reproduce it and no luck yet.

  12. Steveplays28 commented on Nov 9, 2024

    @Steveplays28
    Steveplays28
    on Nov 9, 2024

    I'm running into this issue consistently on rustc 1.84.0-nightly (b91a3a056 2024-11-07), I can reproduce it using cargo watch -x 'run'.
    My project is a Bevy v0.14 project with the following .cargo/config.toml:

    [target.x86_64-unknown-linux-gnu]
linker = "clang"
rustflags = [
	"-Clink-arg=-fuse-ld=/usr/bin/mold",
	"-Zshare-generics=y",
	"-Zthreads=0",
]

[target.x86_64-apple-darwin]
rustflags = ["-Zshare-generics=y", "-Zthreads=0"]

[target.aarch64-apple-darwin]
rustflags = ["-Zshare-generics=y", "-Zthreads=0"]

[target.x86_64-pc-windows-msvc]
linker = "rust-lld.exe"

[alias]
ci = "run --package ci --"

    The note below the error:

    note: rust-lld: error: undefined symbol: anon.943fccffe3bb9e72564e62487959bf2b.4.llvm.861820981140804743␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\vec\spec_from_iter_nested.rs:62␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.3k4lyzcfsw3ol3dbx5o7bixv7.rcgu.o):(_$LT$alloc..vec..Vec$LT$T$GT$$u20$as$u20$alloc..vec..spec_from_iter_nested..SpecFromIterNested$LT$T$C$I$GT$$GT$::from_iter::hf6d67dfa0f06f7b1)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\vec\mod.rs:3551␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.3k4lyzcfsw3ol3dbx5o7bixv7.rcgu.o):(alloc::vec::Vec$LT$T$C$A$GT$::extend_trusted::h0fa532119f7f92bd)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\vec\spec_extend.rs:29␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.3k4lyzcfsw3ol3dbx5o7bixv7.rcgu.o):(_$LT$alloc..vec..Vec$LT$T$C$A$GT$$u20$as$u20$alloc..vec..spec_extend..SpecExtend$LT$T$C$I$GT$$GT$::spec_extend::hf85c8b52d6efdc12)␍
          ␍
          rust-lld: error: undefined symbol: anon.19abbfa39b4f89eafddd7ac73b765301.9.llvm.1621929927735906967␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\sync.rs:1886␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.8i9visw8wjnrz5mhhla7i8vot.rcgu.o):(alloc::sync::Arc$LT$T$C$A$GT$::drop_slow::h263f3e75f4486f02)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\sync.rs:1886␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.8i9visw8wjnrz5mhhla7i8vot.rcgu.o):(alloc::sync::Arc$LT$T$C$A$GT$::drop_slow::h2b34f191adfa394e)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\sync.rs:1886␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.8i9visw8wjnrz5mhhla7i8vot.rcgu.o):(alloc::sync::Arc$LT$T$C$A$GT$::drop_slow::h44e7b2d28f76cb18)␍
          >>> referenced 17 more times␍
          ␍
          rust-lld: error: undefined symbol: anon.19abbfa39b4f89eafddd7ac73b765301.27.llvm.1621929927735906967␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\alloc\src\sync.rs:1885␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.8i9visw8wjnrz5mhhla7i8vot.rcgu.o):(alloc::sync::Arc$LT$T$C$A$GT$::drop_slow::h9cefb366b6b1cdc1)␍
          ␍
          rust-lld: error: undefined symbol: core::ptr::drop_in_place$LT$alloc..boxed..Box$LT$dyn$u20$bevy_ecs..schedule..executor..SystemExecutor$GT$$GT$::h4e8e775c12e8fdf3 (.llvm.1621929927735906967)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ptr\mod.rs:521␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5nr10ruw2io88th7gqjo7ppys.rcgu.o):(core::ptr::drop_in_place$LT$$LP$bevy_ecs..intern..Interned$LT$dyn$u20$bevy_ecs..schedule..set..ScheduleLabel$GT$$C$bevy_ecs..schedule..schedule..Schedule$RP$$GT$::h03195623338b0eda)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\ptr\mod.rs:521␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5nr10ruw2io88th7gqjo7ppys.rcgu.o):(?dtor$4@?0?_ZN4core3ptr150drop_in_place$LT$$LP$bevy_ecs..intern..Interned$LT$dyn$u20$bevy_ecs..schedule..set..ScheduleLabel$GT$$C$bevy_ecs..schedule..schedule..Schedule$RP$$GT$17h03195623338b0edaE@4HA)␍
          ␍
          rust-lld: error: undefined symbol: core::ptr::drop_in_place$LT$crossbeam_channel..waker..Waker$GT$::h52f219e6a748c332 (.llvm.1621929927735906967)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h023bbb3c29a75da8)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h023bbb3c29a75da8)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(?dtor$8@?0?_ZN17crossbeam_channel7counter15Sender$LT$C$GT$7release17h023bbb3c29a75da8E@4HA)␍
          >>> referenced 32 more times␍
          ␍
          rust-lld: error: undefined symbol: anon.19abbfa39b4f89eafddd7ac73b765301.30.llvm.1621929927735906967␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h5dcff8e198f9ff35)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h97dcde64118519b6)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h9b726762ec6a8f4a)␍
          >>> referenced 4 more times␍
          ␍
          rust-lld: error: undefined symbol: anon.19abbfa39b4f89eafddd7ac73b765301.31.llvm.1621929927735906967␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h5dcff8e198f9ff35)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h97dcde64118519b6)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(crossbeam_channel::counter::Sender$LT$C$GT$::release::h9b726762ec6a8f4a)␍
          >>> referenced 4 more times␍
          ␍
          rust-lld: error: undefined symbol: core::ptr::drop_in_place$LT$crossbeam_channel..waker..SyncWaker$GT$::h49fb35caeb9aa26f (.llvm.1621929927735906967)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(?dtor$15@?0?_ZN17crossbeam_channel7counter15Sender$LT$C$GT$7release17h5dcff8e198f9ff35E@4HA)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(?dtor$15@?0?_ZN17crossbeam_channel7counter15Sender$LT$C$GT$7release17h97dcde64118519b6E@4HA)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\crossbeam-channel-0.5.13\src\counter.rs:72␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.5t01dp0jcdgiwsh1gv9feo4gn.rcgu.o):(?dtor$15@?0?_ZN17crossbeam_channel7counter15Sender$LT$C$GT$7release17h9b726762ec6a8f4aE@4HA)␍
          >>> referenced 4 more times␍
          ␍
          rust-lld: error: undefined symbol: anon.c8dcd6e2a94e9ad72caa5b9f5bdbbd16.73.llvm.2061661368713964738␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\bevy_render-0.14.2\src\render_resource\bind_group.rs:311␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.1wheyolieg3oayrdy9rt46d7s.rcgu.o):(bevy_render::render_resource::bind_group::AsBindGroup::as_bind_group::hfeb88b04875f1465)␍
          ␍
          rust-lld: error: undefined symbol: core::ptr::drop_in_place$LT$alloc..boxed..Box$LT$dyn$u20$core..any..Any$u2b$core..marker..Sync$u2b$core..marker..Send$GT$$GT$::h57909d9758e272e9 (.llvm.1621929927735906967)␍
          >>> referenced by D:\Repos\voxel_project\src\renderers\ray_tracer\node.rs:107␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.0sw5y1qzgxe19x7jvzcplqq05.rcgu.o):(_$LT$voxel_project..renderers..ray_tracer..node..RayTracerNode$u20$as$u20$bevy_render..render_graph..node..Node$GT$::run::h5a5d343d2e90115e)␍
          >>> referenced by D:\Repos\voxel_project\src\renderers\ray_tracer\node.rs:107␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.0sw5y1qzgxe19x7jvzcplqq05.rcgu.o):(?dtor$120@?0?_ZN115_$LT$voxel_project..renderers..ray_tracer..node..RayTracerNode$u20$as$u20$bevy_render..render_graph..node..Node$GT$3run17h5a5d343d2e90115eE@4HA)␍
          ␍
          rust-lld: error: undefined symbol: core::ptr::drop_in_place$LT$async_executor..Executor..spawn_inner$LT$$LP$$RP$$C$bevy_asset..server..AssetServer..load_with_meta_transform$LT$bevy_render..render_resource..shader..Shader$C$$LP$$RP$$C$$RF$str$GT$..$u7b$$u7b$closure$u7d$$u7d$$GT$..$u7b$$u7b$closure$u7d$$u7d$$GT$::h61e343aef7e4dd31 (.llvm.1621929927735906967)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:447␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):(async_task::raw::RawTask$LT$F$C$T$C$S$C$M$GT$::drop_future::h1b8be430d6a984c7)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:498␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):($ehgcr_10_36)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:628␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):($ehgcr_10_36)␍
          >>> referenced 1 more times␍
          ␍
          rust-lld: error: undefined symbol: _$LT$alloc..boxed..Box$LT$T$C$A$GT$$u20$as$u20$core..ops..drop..Drop$GT$::drop::h2324b20dae25d31b (.llvm.1621929927735906967)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:447␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):(?dtor$5@?0?_ZN10async_task3raw28RawTask$LT$F$C$T$C$S$C$M$GT$11drop_future17h1b8be430d6a984c7E@4HA)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:498␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):(?dtor$24@?0?_ZN10async_task3raw28RawTask$LT$F$C$T$C$S$C$M$GT$3run17h98fabd5ac38b2f3dE@4HA)␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.cargo\registry\src\index.crates.io-6f17d22bba15001f\async-task-4.7.1\src\raw.rs:566␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.c271bs07aj7b1oyvonedja8h8.rcgu.o):(?dtor$48@?0?_ZN10async_task3raw28RawTask$LT$F$C$T$C$S$C$M$GT$3run17h98fabd5ac38b2f3dE@4HA)␍
          >>> referenced 1 more times␍
          ␍
          rust-lld: error: undefined symbol: anon.19abbfa39b4f89eafddd7ac73b765301.4.llvm.1621929927735906967␍
          >>> referenced by C:\ProgramData\scoop\persist\rustup\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\lib\rustlib\src\rust\library\core\src\slice\sort\shared\smallsort.rs:576␍
          >>>               libvoxel_project-6ff1bb4d769cfe22.rlib(voxel_project-6ff1bb4d769cfe22.eh897xgfliomu6k2zhxuuq3m4.rcgu.o):(core::slice::sort::shared::smallsort::insert_tail::h8d3362240683c465)␍

  13. jangler commented on Dec 22, 2024

    @jangler
    jangler
    on Dec 22, 2024

    I have this issue regularly using rustc 1.82.0. I used to think I had to do a cargo clean when I encountered it, but now it seems like I can just cargo run again and it works? For me it's usually at random rather than due to an interrupted build.

    Edit: encountered again after an interrupt; had to cargo clean.

  14. ActuallyHappening commented on Jan 23, 2025

    @ActuallyHappening
    ActuallyHappening
    on Jan 23, 2025

    Getting very similar errors on nightly cargo 1.86.0-nightly (045bf21b3 2025-01-17)

  15. saethlin commented on Jan 23, 2025

    @saethlin
    saethlin
    on Jan 23, 2025
    Member

    It's well-established now that this problem is still ongoing. What would help is someone providing a way to reproduce these problems on-demand, even if involves waiting a few minutes for a script to run compiling a big project in a loop and randomly interrupting it. Anything that can reproduce this cascade of linker errors on-demand within like an hour would be a great step forward.

  16. johanhelsing commented on Sep 9, 2025

    @johanhelsing
    johanhelsing
    on Sep 9, 2025

    This usually happens within 10-20 minutes for me if I develop Bevy projects with "cargo watch -cx run". So if someone else wants to try to reproduce, maybe:

    cargo install cargo-watch
git checkout https://github.com/bevyengine/bevy
cd bevy
cargo watch -cx "run --example hello_world"
<-- make changes, scripted or manual for a while -->
  17. leomeinel
    added 3 commits that reference this issue on Dec 11, 2025

    building: Re-enable dynamic linking

    9539d20

    building: Re-enable dynamic linking

    80426b5

    building: Re-enable dynamic linking

    53e87aa
  18. svieujot
    added 2 commits that reference this issue on Sep 1, 2026

    cite the rustc issue behind undefined data symbols

    01480de

    add an integration fixture with an undefined extern data symbol

    b619020
  19. WorldSEnder
    added a commit that references this issue on Sep 11, 2026

    tolerate undefined data symbols in emitted modules (#59)

    9b3f1c5
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    A-contributor-roadblockArea: Makes things more difficult for new or seasoned contributors to RustA-incr-compArea: Incremental compilationA-linkageArea: linking into static, shared libraries and binariesC-bugCategory: This is a bug.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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