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

[jyn514]

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.

[petrochenkov]

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

[petrochenkov]

cc #85309 #86049

[petrochenkov]

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

[RalfJung]

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