llvm error when building `compiler_builtins` with rustc with sancov since update to llvm 23

I was trying to build rustc with coverage for afl once again but since the upgrade to llvm 23, llvm crashes in the process.

my repro looks somewhat like this

export RUSTC_BOOTSTRAP=1
echo "cargo afl config --update --force"
export AFLP=`cargo afl config --update --force |& grep home/matthias | awk 'NF>1{print $NF}'` #will not work for you like this but you get the idea
echo $AFLP # /home/matthias/.local/share/afl.rs/rustc-1.100.0-nightly-bff8e12/afl.rs-0.18.2
export AFL_LLVM_DENYLIST="/home/matthias/vcs/github/rust_fuzz/ignore_list.txt" #just just excludes ~/.cargo, can probably be skipped
export RUSTFLAGS=" -Clink-arg=${AFLP}/afl-llvm/afl-compiler-rt.o  -Ccodegen-units=1 -Copt-level=3 -Zvalidate-mir -Cpasses=sancov-module -Cllvm-args=-sanitizer-coverage-level=3 -Cllvm-args=-sanitizer-coverage-trace-pc-guard -Cllvm-args=-sanitizer-coverage-trace-compares --cfg=fuzzing -Ctarget-cpu=native -Clinker-plugin-lto -Zverify-llvm-ir  -Cllvm-args=--verify-machineinstrs   -Cllvm-args=--verify-memoryssa    -Cllvm-args=--verify-scev  -Cllvm-args=--verify-loop-info -Cllvm-args=--verify-memoryssa  -Cllvm-args=--verify-dom-info   -Cllvm-args=--verify-loop-lcssa  -Cllvm-args=--verify-regalloc -Cllvm-args=--verify-coalescing   -Cllvm-args=--verify-region-info  " # I threw in some llvm verifyer flags to see if they would catch anything
export AFL_MAP_SIZE=2996019

./x.py build --stage=1 compiler -j 5  # I "only" have 32 gb of ram so I needed to limit job count
export LD_BIND_LAZY="whatever"  #this fixed something for me but I dont remember what it was 

./x.py build library --target x86_64-unknown-linux-gnu  # this is the step that actually crashed

Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
    Finished `release` profile [optimized + debuginfo] target(s) in 0.43s
Creating a sysroot for stage1 compiler (use `rustup toolchain link 'name' build/host/stage1`)
Building stage1 lld-wrapper (stage0 -> stage1, x86_64-unknown-linux-gnu)
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
    Finished `release` profile [optimized + debuginfo] target(s) in 0.15s
Building stage1 library artifacts{alloc, compiler_builtins, core, panic_abort, panic_unwind, proc_macro, rustc-std-workspace-core, std, std_detect, sysroot, test, unwind} (stage1 -> stage1, x86_64-unknown-linux-gnu)
   Compiling compiler_builtins v0.1.160 (/home/matthias/vcs/github/rust_fuzz2/library/compiler-builtins/compiler-builtins)
   Compiling core v0.0.0 (/home/matthias/vcs/github/rust_fuzz2/library/core)
   Compiling libc v0.2.189
   Compiling object v0.39.1
   Compiling std v0.0.0 (/home/matthias/vcs/github/rust_fuzz2/library/std)
   Compiling test v0.0.0 (/home/matthias/vcs/github/rust_fuzz2/library/test)
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
   Compiling rustc-std-workspace-core v1.99.0 (/home/matthias/vcs/github/rust_fuzz2/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/home/matthias/vcs/github/rust_fuzz2/library/alloc)
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
   Compiling adler2 v2.0.1
   Compiling memchr v2.8.3
   Compiling cfg-if v1.0.4
   Compiling panic_abort v0.0.0 (/home/matthias/vcs/github/rust_fuzz2/library/panic_abort)
   Compiling rustc-demangle v0.1.28
   Compiling rustc-literal-escaper v0.0.8
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2998000 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 5399589 to be able to run this instrumented program if this crashes!
Warning: AFL++ tools might need to set AFL_MAP_SIZE to 2996024 to be able to run this instrumented program if this crashes!
error: rustc interrupted by SIGSEGV, printing backtrace

/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(+0x1d02a25) [0x7f1efc102a25]
/usr/lib/libc.so.6(+0x3e6f0) [0x7f1efa03e6f0]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(_ZNK4llvm18ModuleSummaryIndex21getGlobalValueSummaryEmb+0x2e) [0x7f1ef53fa3ee]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(+0xa375bcf) [0x7f1ef9375bcf]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(_ZN4llvm26ModuleSummaryIndexAnalysis3runERNS_6ModuleERNS_15AnalysisManagerIS1_JEEE+0xc4) [0x7f1ef850689e]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(+0x9504d6a) [0x7f1ef8504d6a]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(_ZN4llvm15AnalysisManagerINS_6ModuleEJEE13getResultImplEPNS_11AnalysisKeyERS1_+0x1cb) [0x7f1ef8506f4b]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(_ZN4llvm24ThinLTOBitcodeWriterPass3runERNS_6ModuleERNS_15AnalysisManagerIS1_JEEE+0x5d) [0x7f1ef85057e7]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM.so.23.1-rust-1.99.0-nightly(_ZN4llvm11PassManagerINS_6ModuleENS_15AnalysisManagerIS1_JEEEJEE3runERS1_RS3_+0x1c9) [0x7f1ef85077e5]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(+0x1abc646) [0x7f1efbebc646]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(+0x236bf42) [0x7f1efc76bf42]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(_RNvXs1_Cskf4YuM4rH4g_18rustc_codegen_llvmNtB5_18LlvmCodegenBackendNtNtNtCs9550KEFd23i_17rustc_codegen_ssa6traits5write19WriteBackendMethods8optimize+0x4c7) [0x7f1efc7fd9b7]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(_RINvNtNtCs30yU1cfpkQp_3std3sys9backtrace28___rust_begin_short_backtraceNCINvNtNtCs9550KEFd23i_17rustc_codegen_ssa4back5write10spawn_workNtCskf4YuM4rH4g_18rustc_codegen_llvm18LlvmCodegenBackendE0uEB2c_+0x207) [0x7f1efc5cf777]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(+0x2287af6) [0x7f1efc687af6]
/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1/lib/librustc_driver-9ab9d1c29af0b044.so(+0x1b2a14f) [0x7f1efbf2a14f]
/usr/lib/libc.so.6(+0x980a2) [0x7f1efa0980a2]
/usr/lib/libc.so.6(+0x12080c) [0x7f1efa12080c]

note: we would appreciate a report at https://github.com/rust-lang/rust
help: you can increase rustc's stack size by setting RUST_MIN_STACK=16777216
rustc exited with signal: 11 (SIGSEGV)
error: could not compile `compiler_builtins` (lib)

Caused by:
  process didn't exit successfully: `/home/matthias/vcs/github/rust_fuzz2/build/bootstrap/debug/rustc /home/matthias/vcs/github/rust_fuzz2/build/bootstrap/debug/rustc --crate-name compiler_builtins --edition=2024 library/compiler-builtins/compiler-builtins/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=157 --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -C opt-level=3 -C embed-bitcode=no -C codegen-units=10000 -C debuginfo=2 -Cembed-bitcode=yes -Zunstable-options -Cforce-frame-pointers=non-leaf -C debug-assertions=on --cfg 'feature="arch"' --cfg 'feature="compiler-builtins"' --cfg 'feature="default"' --cfg 'feature="unmangled-names"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("arch", "c", "compiler-builtins", "default", "mem", "unmangled-names", "unstable-public-internals"))' -C metadata=b0ff770c38593253 -C extra-filename=-432d535274f3888d --out-dir /home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/dist/build/compiler_builtins/432d535274f3888d/out --target x86_64-unknown-linux-gnu -L dependency=/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/dist/build/core/ad7eacf41182b861/out -L dependency=/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1-std/dist/build/compiler_builtins/432d535274f3888d/out --extern core=/home/matthias/vcs/github/rust_fuzz2/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/dist/build/core/ad7eacf41182b861/out/libcore-ad7eacf41182b861.rmeta -Zannotate-moves '--check-cfg=cfg(feature,values(any()))' -Zunstable-options -Zmacro-backtrace -Csplit-debuginfo=off -Cprefer-dynamic -Zinline-mir -Zinline-mir-preserve-debug -Zmir_strip_debuginfo=locals-in-tiny-functions -Clink-args=-Wl,-z,origin '-Clink-args=-Wl,-rpath,$ORIGIN/../lib' -Alinker-messages '-Zcrate-attr=doc(html_root_url="https://doc.rust-lang.org/nightly/")' -Clink-arg=/home/matthias/.local/share/afl.rs/rustc-1.100.0-nightly-bff8e12/afl.rs-0.18.2/afl-llvm/afl-compiler-rt.o -Ccodegen-units=1 -Copt-level=3 -Zvalidate-mir -Cpasses=sancov-module -Cllvm-args=-sanitizer-coverage-level=3 -Cllvm-args=-sanitizer-coverage-trace-pc-guard -Cllvm-args=-sanitizer-coverage-trace-compares --cfg=fuzzing -Ctarget-cpu=native -Clinker-plugin-lto -Zverify-llvm-ir -Cllvm-args=--verify-machineinstrs -Cllvm-args=--verify-memoryssa -Cllvm-args=--verify-scev -Cllvm-args=--verify-loop-info -Cllvm-args=--verify-memoryssa -Cllvm-args=--verify-dom-info -Cllvm-args=--verify-loop-lcssa -Cllvm-args=--verify-regalloc -Cllvm-args=--verify-coalescing -Cllvm-args=--verify-region-info -Z binary-dep-depinfo --cfg intrinsics_enabled --cfg optimizations_enabled --cfg f16_enabled --cfg f128_enabled --cfg mem_unaligned --check-cfg 'cfg(thumb)' --check-cfg 'cfg(thumb_1)' --check-cfg 'cfg(x86_no_sse2)' --check-cfg 'cfg(assert_no_panic)' --check-cfg 'cfg(intrinsics_enabled)' --check-cfg 'cfg(optimizations_enabled)' --check-cfg 'cfg(f16_enabled)' --check-cfg 'cfg(f128_enabled)' --check-cfg 'cfg(__ashldi3, values("optimized-c"))' --check-cfg 'cfg(__ashlsi3, values("optimized-c"))' --check-cfg 'cfg(__ashrdi3, values("optimized-c"))' --check-cfg 'cfg(__ashrsi3, values("optimized-c"))' --check-cfg 'cfg(__bswapsi2, values("optimized-c"))' --check-cfg 'cfg(__bswapdi2, values("optimized-c"))' --check-cfg 'cfg(__bswapti2, values("optimized-c"))' --check-cfg 'cfg(__divdi3, values("optimized-c"))' --check-cfg 'cfg(__divsi3, values("optimized-c"))' --check-cfg 'cfg(__divmoddi4, values("optimized-c"))' --check-cfg 'cfg(__divmodsi4, values("optimized-c"))' --check-cfg 'cfg(__divmodsi4, values("optimized-c"))' --check-cfg 'cfg(__divmodti4, values("optimized-c"))' --check-cfg 'cfg(__lshrdi3, values("optimized-c"))' --check-cfg 'cfg(__lshrsi3, values("optimized-c"))' --check-cfg 'cfg(__moddi3, values("optimized-c"))' --check-cfg 'cfg(__modsi3, values("optimized-c"))' --check-cfg 'cfg(__muldi3, values("optimized-c"))' --check-cfg 'cfg(__udivdi3, values("optimized-c"))' --check-cfg 'cfg(__udivmoddi4, values("optimized-c"))' --check-cfg 'cfg(__udivmodsi4, values("optimized-c"))' --check-cfg 'cfg(__udivsi3, values("optimized-c"))' --check-cfg 'cfg(__umoddi3, values("optimized-c"))' --check-cfg 'cfg(__umodsi3, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas16_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas16_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas16_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_cas16_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldadd8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldclr8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldeor8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_ldset8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp1_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp1_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp1_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp1_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp2_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp2_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp2_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp2_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp4_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp4_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp4_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp4_acq_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp8_relax, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp8_acq, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp8_rel, values("optimized-c"))' --check-cfg 'cfg(__aarch64_swp8_acq_rel, values("optimized-c"))' --check-cfg 'cfg(target_feature, values("vis3"))' --check-cfg 'cfg(mem_unaligned)' --check-cfg 'cfg(kernel_user_helpers)'` (exit status: 254)
warning: build failed, waiting for other jobs to finish...
Build completed unsuccessfully in 0:01:54

Reproduce the failure with the reported RUSTFLAGS and ./x.py build library --target x86_64-unknown-linux-gnu, focusing on the stage1 compiler_builtins build. Start with the LLVM stack frames for ModuleSummaryIndex::getGlobalValueSummary and ThinLTOBitcodeWriterPass, then compare runs with the sancov and linker-plugin-LTO options. Done means the reported stage1 library build completes without the SIGSEGV.