error: rustc interrupted by SIGSEGV -- i686 OOM

[ctron]

Running a build of trunk, as part of a Koiji (Fedora Build System) job, I get the following for the i686 target:

Also see: https://kojipkgs.fedoraproject.org//work/tasks/2175/113752175/build.log

     Running `/usr/bin/rustc --crate-name trunk --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C opt-level=3 -C panic=abort -C lto=fat -C codegen-units=1 -C debuginfo=2 -C metadata=d3ec747c4cc21fae -C extra-filename=-d3ec747c4cc21fae --out-dir /builddir/build/BUILD/trunk-0.18.8/target/rpm/deps -L dependency=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps --extern ansi_term=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libansi_term-c9a74fb1c5a33450.rlib --extern anyhow=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libanyhow-dd048082dae418bb.rlib --extern async_recursion=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libasync_recursion-c69e2e329310a5a4.so --extern axum=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libaxum-ac356d2aa4feb267.rlib --extern axum_server=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libaxum_server-4d9001becb5ce6f6.rlib --extern base64=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libbase64-888a08a1d17b3136.rlib --extern bytes=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libbytes-1942756fbc7ff3f5.rlib --extern cargo_lock=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcargo_lock-3bedda8dcf2bd92e.rlib --extern cargo_metadata=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcargo_metadata-13d0b92ddcd9dc1d.rlib --extern clap=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libclap-208af58cda91ff8e.rlib --extern console=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libconsole-be11c805d7b150ab.rlib --extern css_minify=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcss_minify-6b9f55f91bd0178a.rlib --extern directories=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libdirectories-8da71472ea013b8f.rlib --extern dunce=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libdunce-4105c42cb1567e0a.rlib --extern envy=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libenvy-fcec93522e880756.rlib --extern flate2=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libflate2-c43669308ba55796.rlib --extern futures_util=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libfutures_util-4d4deb3e4637bb82.rlib --extern hex=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhex-c474070b6b59f573.rlib --extern htmlescape=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhtmlescape-061ab0d2a39d69b7.rlib --extern http_body=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhttp_body-2d1e45a2614d06ca.rlib --extern humantime=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhumantime-278d9379cde96194.rlib --extern humantime_serde=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhumantime_serde-db7d2ea4d7a0a7dd.rlib --extern hyper=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhyper-34b7f79d93066f32.rlib --extern lightningcss=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liblightningcss-fb29360f52959467.rlib --extern local_ip_address=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liblocal_ip_address-3113cdb67a5dff42.rlib --extern mime_guess=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libmime_guess-be195c8a943faa19.rlib --extern minify_html=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libminify_html-76ef26fd2ed499ab.rlib --extern minify_js=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libminify_js-361bcf99267f5936.rlib --extern nipper=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnipper-879431096c30b7ee.rlib --extern notify=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnotify-e1a4be633bd8a41d.rlib --extern notify_debouncer_full=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnotify_debouncer_full-970b1992d2b22302.rlib --extern once_cell=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libonce_cell-7cd748c2563a78c0.rlib --extern open=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libopen-739254795e6c5ee7.rlib --extern oxipng=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liboxipng-97b9886d7eefad2d.rlib --extern parking_lot=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libparking_lot-1f4c5b39f1a989bf.rlib --extern remove_dir_all=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libremove_dir_all-ca007ee62736d362.rlib --extern reqwest=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libreqwest-2fd2027d4a7e1435.rlib --extern seahash=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libseahash-aa4788848059bd91.rlib --extern serde=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libserde-0e3c22b8a86f10a3.rlib --extern serde_json=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libserde_json-3da9734373291be3.rlib --extern sha2=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libsha2-af789abc53e545a1.rlib --extern strum=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libstrum-6aad415c38f72078.rlib --extern tar=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtar-90b7c93a92264b36.rlib --extern thiserror=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libthiserror-bccc0d9083114dce.rlib --extern tokio=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio-99e61a37c268ec96.rlib --extern tokio_stream=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio_stream-5fd73724da08b397.rlib --extern tokio_tungstenite=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio_tungstenite-8606b84c9adc7236.rlib --extern toml=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtoml-0edc7c99832fdd13.rlib --extern tower_http=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtower_http-2406bf889da5a646.rlib --extern tracing=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtracing-4f8ee5d8ef85a130.rlib --extern tracing_subscriber=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtracing_subscriber-c81d2f014e955f9d.rlib --extern which=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libwhich-b5cddcb173f53f82.rlib --extern zip=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libzip-22daa20d7a6a3f37.rlib -Copt-level=3 -Cdebuginfo=2 -Ccodegen-units=1 -Cstrip=none -Clink-arg=-Wl,-z,relro -Clink-arg=-Wl,-z,now -Clink-arg=-specs=/usr/lib/rpm/redhat/redhat-package-notes --cap-lints=warn -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/ring-d8d3c8e8e3c88903/out -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/libdeflate-sys-966c87b836b83231/out/lib -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/bzip2-sys-65b4b2d68c93585b/out/lib -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/zstd-sys-b01e8ba32de86af3/out`
error: rustc interrupted by SIGSEGV, printing backtrace
/usr/lib/librustc_driver-52ec46fe17a0f019.so(+0x578c47)[0xf3778c47]
linux-gate.so.1(__kernel_sigreturn+0x0)[0xf7ed85a0]
/usr/lib/libLLVM-17.so(+0xcd8c2c)[0xec6d8c2c]
/usr/lib/libLLVM-17.so(+0xcd87fb)[0xec6d87fb]
/usr/lib/libLLVM-17.so(_ZN4llvm15ValueHandleBase14ValueIsDeletedEPNS_5ValueE+0x121)[0xec1f71c1]
/usr/lib/libLLVM-17.so(_ZN4llvm5ValueD1Ev+0x28)[0xec1f74a8]
/usr/lib/libLLVM-17.so(_ZN4llvm12GlobalObjectD1Ev+0x44)[0xec157034]
/usr/lib/libLLVM-17.so(+0x7c1ddd)[0xec1c1ddd]
/usr/lib/libLLVM-17.so(_ZN4llvm6ModuleD1Ev+0x64)[0xec1bd634]
/usr/lib/libLLVM-17.so(_ZN4llvm15LLVMContextImplD1Ev+0xb6)[0xec1867b6]
/usr/lib/libLLVM-17.so(_ZN4llvm11LLVMContextD1Ev+0x28)[0xec184768]
/usr/lib/libLLVM-17.so(LLVMContextDispose+0x26)[0xec0b6216]
/usr/lib/librustc_driver-52ec46fe17a0f019.so(+0x7eb746)[0xf39eb746]
/usr/lib/librustc_driver-52ec46fe17a0f019.so(_RNvXs1_Cs5wJj2IwsfEc_18rustc_codegen_llvmNtB5_18LlvmCodegenBackendNtNtNtCs2Ot5weHMREJ_17rustc_codegen_ssa6traits5write19WriteBackendMethods11run_fat_lto+0x30e9)[0xf3a04809]
/usr/lib/librustc_driver-52ec46fe17a0f019.so(+0x8f257a)[0xf3af257a]
/usr/lib/librustc_driver-52ec46fe17a0f019.so(+0x8f887a)[0xf3af887a]
/usr/lib/libstd-3ea11b8b961b5e64.so(rust_metadata_std_58d9b43584c2b021+0x7fe5c)[0xf313ae5c]
/usr/lib/libc.so.6(+0x92923)[0xf2f54923]
/usr/lib/libc.so.6(+0x117d88)[0xf2fd9d88]
note: we would appreciate a report at https://github.com/rust-lang/rust
error: could not compile `trunk` (bin "trunk")
Caused by:
  process didn't exit successfully: `/usr/bin/rustc --crate-name trunk --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C opt-level=3 -C panic=abort -C lto=fat -C codegen-units=1 -C debuginfo=2 -C metadata=d3ec747c4cc21fae -C extra-filename=-d3ec747c4cc21fae --out-dir /builddir/build/BUILD/trunk-0.18.8/target/rpm/deps -L dependency=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps --extern ansi_term=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libansi_term-c9a74fb1c5a33450.rlib --extern anyhow=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libanyhow-dd048082dae418bb.rlib --extern async_recursion=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libasync_recursion-c69e2e329310a5a4.so --extern axum=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libaxum-ac356d2aa4feb267.rlib --extern axum_server=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libaxum_server-4d9001becb5ce6f6.rlib --extern base64=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libbase64-888a08a1d17b3136.rlib --extern bytes=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libbytes-1942756fbc7ff3f5.rlib --extern cargo_lock=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcargo_lock-3bedda8dcf2bd92e.rlib --extern cargo_metadata=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcargo_metadata-13d0b92ddcd9dc1d.rlib --extern clap=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libclap-208af58cda91ff8e.rlib --extern console=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libconsole-be11c805d7b150ab.rlib --extern css_minify=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libcss_minify-6b9f55f91bd0178a.rlib --extern directories=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libdirectories-8da71472ea013b8f.rlib --extern dunce=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libdunce-4105c42cb1567e0a.rlib --extern envy=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libenvy-fcec93522e880756.rlib --extern flate2=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libflate2-c43669308ba55796.rlib --extern futures_util=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libfutures_util-4d4deb3e4637bb82.rlib --extern hex=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhex-c474070b6b59f573.rlib --extern htmlescape=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhtmlescape-061ab0d2a39d69b7.rlib --extern http_body=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhttp_body-2d1e45a2614d06ca.rlib --extern humantime=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhumantime-278d9379cde96194.rlib --extern humantime_serde=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhumantime_serde-db7d2ea4d7a0a7dd.rlib --extern hyper=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libhyper-34b7f79d93066f32.rlib --extern lightningcss=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liblightningcss-fb29360f52959467.rlib --extern local_ip_address=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liblocal_ip_address-3113cdb67a5dff42.rlib --extern mime_guess=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libmime_guess-be195c8a943faa19.rlib --extern minify_html=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libminify_html-76ef26fd2ed499ab.rlib --extern minify_js=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libminify_js-361bcf99267f5936.rlib --extern nipper=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnipper-879431096c30b7ee.rlib --extern notify=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnotify-e1a4be633bd8a41d.rlib --extern notify_debouncer_full=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libnotify_debouncer_full-970b1992d2b22302.rlib --extern once_cell=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libonce_cell-7cd748c2563a78c0.rlib --extern open=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libopen-739254795e6c5ee7.rlib --extern oxipng=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/liboxipng-97b9886d7eefad2d.rlib --extern parking_lot=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libparking_lot-1f4c5b39f1a989bf.rlib --extern remove_dir_all=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libremove_dir_all-ca007ee62736d362.rlib --extern reqwest=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libreqwest-2fd2027d4a7e1435.rlib --extern seahash=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libseahash-aa4788848059bd91.rlib --extern serde=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libserde-0e3c22b8a86f10a3.rlib --extern serde_json=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libserde_json-3da9734373291be3.rlib --extern sha2=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libsha2-af789abc53e545a1.rlib --extern strum=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libstrum-6aad415c38f72078.rlib --extern tar=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtar-90b7c93a92264b36.rlib --extern thiserror=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libthiserror-bccc0d9083114dce.rlib --extern tokio=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio-99e61a37c268ec96.rlib --extern tokio_stream=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio_stream-5fd73724da08b397.rlib --extern tokio_tungstenite=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtokio_tungstenite-8606b84c9adc7236.rlib --extern toml=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtoml-0edc7c99832fdd13.rlib --extern tower_http=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtower_http-2406bf889da5a646.rlib --extern tracing=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtracing-4f8ee5d8ef85a130.rlib --extern tracing_subscriber=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libtracing_subscriber-c81d2f014e955f9d.rlib --extern which=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libwhich-b5cddcb173f53f82.rlib --extern zip=/builddir/build/BUILD/trunk-0.18.8/target/rpm/deps/libzip-22daa20d7a6a3f37.rlib -Copt-level=3 -Cdebuginfo=2 -Ccodegen-units=1 -Cstrip=none -Clink-arg=-Wl,-z,relro -Clink-arg=-Wl,-z,now -Clink-arg=-specs=/usr/lib/rpm/redhat/redhat-package-notes --cap-lints=warn -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/ring-d8d3c8e8e3c88903/out -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/libdeflate-sys-966c87b836b83231/out/lib -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/bzip2-sys-65b4b2d68c93585b/out/lib -L native=/builddir/build/BUILD/trunk-0.18.8/target/rpm/build/zstd-sys-b01e8ba32de86af3/out` (signal: 11, SIGSEGV: invalid memory reference)

[ctron]

To my understanding this should be Rust 1.76.0

[cuviper]

I think this is "just" an OOM situation. Fedora builds with full debuginfo by default, and this package is configured for fat LTO as well, which will all get quite heavy. When I tried to reproduce this with the rustup stable toolchain, I got:

LLVM ERROR: out of memory
Allocation failed

It completed when I turned off debuginfo though. With Fedora's toolchain, I can reproduce your SIGSEGV in LLVM, but it also completes the build when debuginfo is off. My guess is that it is also hitting an allocation failure, but perhaps in a place that doesn't properly check the pointer before trying to use it.

[cuviper]

With the rustup toolchain, it's running out of memory in LLVM's SmallVector, which calls llvm::safe_* allocation methods that abort on failure. That's where we get the "LLVM ERROR: out of memory", "Allocation failed".

With the Fedora toolchain, it's running out of memory in LLVM's DenseMap, which calls llvm::allocate_buffer to plain ::operator new, throwing std::bad_alloc. Rust runs its own destructors during that unwind, in particular dropping ModuleCodegen<ModuleLlvm> that calls LLVMContextDispose, and this segfaults in a DenseMap (presumably the same one).

Thread 4 "coordinator" hit Catchpoint 1 (exception thrown), 0xeb696f2a in __cxxabiv1::__cxa_throw (obj=0xffc48410, tinfo=0xeb8603f0 <typeinfo for std::bad_alloc>, dest=0xeb694c30 <std::bad_alloc::~bad_alloc()>)
    at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:81
81        PROBE2 (throw, obj, tinfo);
(gdb) bt
#0  0xeb696f2a in __cxxabiv1::__cxa_throw (obj=0xffc48410, tinfo=0xeb8603f0 <typeinfo for std::bad_alloc>, dest=0xeb694c30 <std::bad_alloc::~bad_alloc()>) at ../../../../libstdc++-v3/libsupc++/eh_throw.cc:81
#1  0xeb67f8b4 in operator new (sz=134217728, al=4) at ../../../../libstdc++-v3/libsupc++/new_opa.cc:153
#2  0xebf81f04 in llvm::allocate_buffer(unsigned int, unsigned int) () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/Support/MemAlloc.cpp:16
#3  0xecd48bb3 in allocateBuckets () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/DenseMap.h:899
[...]
#23 linkInModule () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/Linker/LinkModules.cpp:607
#24 0xf372395d in LLVMRustLinkerAdd (L=0xa3d96a70, BC=0xb3400010 "BC\300\3365\024", Len=23603900) at /usr/include/c++/14/bits/unique_ptr.h:191
#25 0xf3a032ff in <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::write::WriteBackendMethods>::run_fat_lto () from /usr/lib/librustc_driver-52ec46fe17a0f019.so
[...]
(gdb) c
Continuing.

Thread 4 "coordinator" received signal SIGSEGV, Segmentation fault.
LookupBucketFor<llvm::ValueMapCallbackVH<llvm::Value const*, llvm::WeakTrackingVH, llvm::ValueMapConfig<llvm::Value const*, llvm::sys::SmartMutex<false> > > > () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/DenseMap.h:658
658           if (LLVM_LIKELY(KeyInfoT::isEqual(Val, ThisBucket->getFirst()))) {
(gdb) bt
#0  LookupBucketFor<llvm::ValueMapCallbackVH<llvm::Value const*, llvm::WeakTrackingVH, llvm::ValueMapConfig<llvm::Value const*, llvm::sys::SmartMutex<false> > > > () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/DenseMap.h:658
#1  LookupBucketFor<llvm::ValueMapCallbackVH<llvm::Value const*, llvm::WeakTrackingVH, llvm::ValueMapConfig<llvm::Value const*, llvm::sys::SmartMutex<false> > > > () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/DenseMap.h:689
#2  erase () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/DenseMap.h:331
#3  0xec6d87fb in deleted () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/IR/ValueMap.h:267
#4  0xec1f71c1 in ValueIsDeleted () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/Value.cpp:1230
#5  0xec1f74a8 in ~Value () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/Value.cpp:79
#6  0xec157034 in ~GlobalValue () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/IR/GlobalValue.h:188
#7  ~GlobalObject () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/Globals.cpp:98
#8  0xec1c1ddd in ~GlobalVariable () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/IR/GlobalVariable.h:69
#9  deleteNode () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/ilist.h:42
#10 erase () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/ilist.h:205
#11 0xec1bd634 in erase () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/ilist.h:242
#12 clear () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/include/llvm/ADT/ilist.h:246
#13 ~Module () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/Module.cpp:81
#14 0xec1867b6 in ~LLVMContextImpl () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/LLVMContextImpl.cpp:52
#15 0xec184768 in llvm::LLVMContext::~LLVMContext() () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/LLVMContext.cpp:113
#16 0xec0b6216 in LLVMContextDispose () at /usr/src/debug/llvm-17.0.6-6.fc40.i386/lib/IR/Core.cpp:129
#17 0xf39eb746 in core::ptr::drop_in_place::<rustc_codegen_ssa::ModuleCodegen<rustc_codegen_llvm::ModuleLlvm>> () from /usr/lib/librustc_driver-52ec46fe17a0f019.so
#18 0xf3a04809 in <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::write::WriteBackendMethods>::run_fat_lto () from /usr/lib/librustc_driver-52ec46fe17a0f019.so

[Librazy]

I encontered this when compiling a big proprietary project to --target=i686-unknown-linux-musl using nightly-2024-03-01 on a x86_64 host

error: rustc interrupted by SIGSEGV, printing backtrace
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x2f0de43)[0x7f985610de43]
/lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x7f9853019520]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(+0x5d96596)[0x7f9851796596]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(+0x5e8f617)[0x7f985188f617]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm18ScheduleDAGSDNodes12EmitScheduleERNS_26MachineInstrBundleIteratorINS_12MachineInstrELb0EEE+0x4a0)[0x7f9851889360]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm16SelectionDAGISel17CodeGenAndEmitDAGEv+0x1a22)[0x7f9851935622]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm16SelectionDAGISel20SelectAllBasicBlocksERKNS_8FunctionE+0x1589)[0x7f98519303c9]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm16SelectionDAGISel20runOnMachineFunctionERNS_15MachineFunctionE+0x853)[0x7f985171d713]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(+0x5d1ce93)[0x7f985171ce93]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0xb00)[0x7f985153fbd0]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x2f)[0x7f985153f0af]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libLLVM-18-rust-1.78.0-nightly.so(_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x264)[0x7f9851a34b6a]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x57aaafa)[0x7f98589aaafa]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x4c6b9aa)[0x7f9857e6b9aa]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x4c6975a)[0x7f9857e6975a]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x4c69442)[0x7f9857e69442]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x4c6793d)[0x7f9857e6793d]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/librustc_driver-57b4203c90092e15.so(+0x4c66efd)[0x7f9857e66efd]
/usr/local/rustup/toolchains/nightly-2024-03-01-x86_64-unknown-linux-gnu/lib/libstd-41777efa78699460.so(rust_metadata_std_7b1098677428ad7b+0xc1955)[0x7f9859456955]
/lib/x86_64-linux-gnu/libc.so.6(+0x94ac3)[0x7f985306bac3]
/lib/x86_64-linux-gnu/libc.so.6(+0x126850)[0x7f98530fd850]

[cuviper]

@Librazy with an x86_64 host and a different backtrace, I doubt that yours has the same root cause. I suggest filing a separate issue -- but it's going to be hard for anyone to help if they can't reproduce it, since your code is proprietary.