[llvm] [DenseMap] Store occupancy in a packed used-bit array (PR #201281)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Thu Jun 4 19:14:26 PDT 2026 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-ubsan` running on `sanitizer-buildbot10` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/85/builds/22249

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
-- Testing: 98856 tests, 72 workers --
Testing: 
FAIL: Clang :: ASTMerge/anonymous-fields/test.cpp (1044 of 98856)
******************** TEST 'Clang :: ASTMerge/anonymous-fields/test.cpp' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 1
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields1.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields1.cpp
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields2.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields2.cpp
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
# | Stack dump:
# | 0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# | 1.	<eof> parser at end of file
# | 2.	Code generation
# | 3.	Releasing pass 'Assumption Cache Tracker'
# |  #0 0x0000c3390f2f123c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:880:13
# |  #1 0x0000c3390f2ee648 __cxx_atomic_store<CallbackAndCookie::Status> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__atomic/support/c11.h:68:3
# |  #2 0x0000c3390f2ee648 store /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__atomic/atomic.h:62:5
# |  #3 0x0000c3390f2ee648 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Signals.cpp:110:16
# |  #4 0x0000c3390f2f2814 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:448:38
# |  #5 0x0000c3390f2f2328 end<const int, 10UL> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__iterator/access.h:29:18
# |  #6 0x0000c3390f2f2328 end_impl<const int (&)[10]> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/ADL.h:37:10
# |  #7 0x0000c3390f2f2328 adl_end<const int (&)[10]> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/ADL.h:88:10
# |  #8 0x0000c3390f2f2328 is_contained<const int (&)[10], int> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/STLExtras.h:1952:40
# |  #9 0x0000c3390f2f2328 SignalHandlerTerminate(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:464:7
# | #10 0x0000e9a88cb9aa20 (linux-vdso.so.1+0xa20)
# | #11 0x0000e9a88c54e13c (/usr/lib/aarch64-linux-gnu/libc.so.6+0x8e13c)
# | #12 0x0000e9a88c4f85fc raise (/usr/lib/aarch64-linux-gnu/libc.so.6+0x385fc)
# | #13 0x0000e9a88c4e2720 abort (/usr/lib/aarch64-linux-gnu/libc.so.6+0x22720)
# | #14 0x0000c3390b67b840 __sanitizer::Atexit(void (*)()) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:170:10
Step 11 (stage2/ubsan check) failure: stage2/ubsan check (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using lld-link: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/lld-link
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using ld64.lld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/ld64.lld
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/utils/lit/lit/llvm/config.py:569: note: using wasm-ld: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/wasm-ld
-- Testing: 98856 tests, 72 workers --
Testing: 
FAIL: Clang :: ASTMerge/anonymous-fields/test.cpp (1044 of 98856)
******************** TEST 'Clang :: ASTMerge/anonymous-fields/test.cpp' FAILED ********************
Exit Code: -6

Command Output (stdout):
--
# RUN: at line 1
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields1.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields1.cpp
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields2.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-pch -o /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/Inputs/anonymous-fields2.cpp
# note: command had no output on stdout or stderr
# RUN: at line 3
/home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# .---command stderr------------
# | PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
# | Stack dump:
# | 0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/bin/clang -cc1 -internal-isystem /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/lib/clang/23/include -nostdsysteminc -emit-obj -o /dev/null -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.1.ast -ast-merge /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm_build_ubsan/tools/clang/test/ASTMerge/anonymous-fields/Output/test.cpp.tmp.2.ast /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/clang/test/ASTMerge/anonymous-fields/test.cpp
# | 1.	<eof> parser at end of file
# | 2.	Code generation
# | 3.	Releasing pass 'Assumption Cache Tracker'
# |  #0 0x0000c3390f2f123c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:880:13
# |  #1 0x0000c3390f2ee648 __cxx_atomic_store<CallbackAndCookie::Status> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__atomic/support/c11.h:68:3
# |  #2 0x0000c3390f2ee648 store /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__atomic/atomic.h:62:5
# |  #3 0x0000c3390f2ee648 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Signals.cpp:110:16
# |  #4 0x0000c3390f2f2814 SignalHandler(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:448:38
# |  #5 0x0000c3390f2f2328 end<const int, 10UL> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/libcxx_install_ubsan/include/c++/v1/__iterator/access.h:29:18
# |  #6 0x0000c3390f2f2328 end_impl<const int (&)[10]> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/ADL.h:37:10
# |  #7 0x0000c3390f2f2328 adl_end<const int (&)[10]> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/ADL.h:88:10
# |  #8 0x0000c3390f2f2328 is_contained<const int (&)[10], int> /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/include/llvm/ADT/STLExtras.h:1952:40
# |  #9 0x0000c3390f2f2328 SignalHandlerTerminate(int, siginfo_t*, void*) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:464:7
# | #10 0x0000e9a88cb9aa20 (linux-vdso.so.1+0xa20)
# | #11 0x0000e9a88c54e13c (/usr/lib/aarch64-linux-gnu/libc.so.6+0x8e13c)
# | #12 0x0000e9a88c4f85fc raise (/usr/lib/aarch64-linux-gnu/libc.so.6+0x385fc)
# | #13 0x0000e9a88c4e2720 abort (/usr/lib/aarch64-linux-gnu/libc.so.6+0x22720)
# | #14 0x0000c3390b67b840 __sanitizer::Atexit(void (*)()) /home/b/sanitizer-aarch64-linux-bootstrap-ubsan/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:170:10

```

</details>

https://github.com/llvm/llvm-project/pull/201281

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