[libcxx-commits] [libcxx] [libc++] Don't try to wait on a thread that hasn't started in std::async, take 2 (PR #130145)

Thu Jun 26 03:50:38 PDT 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-hwasan` running on `sanitizer-buildbot11` while building `libcxx` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/55/builds/13334

<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-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{cxx} substitution: '/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{flags} substitution: '-pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{compile_flags} substitution: '-nostdinc++ -I %{target-include-dir} -I %{include-dir} -I %{libcxx-dir}/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{link_flags} substitution: '-lc++experimental -nostdlib++ -L %{lib-dir} -Wl,-rpath,%{lib-dir} -lc++ -latomic'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{benchmark_flags} substitution: '-I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/include -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/lib -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/lib64 -l benchmark'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{exec} substitution: '%{executor} --execdir %T -- '
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) All available features: add-latomic-workaround, buildhost=linux, c++26, c++experimental, can-create-symlinks, character-conversion-warnings, clang, clang-21, clang-21.0, clang-21.0.0, diagnose-if-support, enable-benchmarks=no, gcc-style-warnings, glibc-old-ru_RU-decimal-point, has-1024-bit-atomics, has-64-bit-atomics, has-fblocks, has-fconstexpr-steps, has-unix-headers, hwasan, large_tests, libcpp-abi-version=1, libcpp-hardening-mode=none, libcpp-has-no-availability-markup, libcpp-has-thread-api-pthread, linux, lsan, objective-c++, optimization=none, sanitizer-new-delete, std-at-least-c++03, std-at-least-c++11, std-at-least-c++14, std-at-least-c++17, std-at-least-c++20, std-at-least-c++23, std-at-least-c++26, stdlib=libc++, stdlib=llvm-libc++, target=aarch64-unknown-linux-gnu, thread-safety, verify-support
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:73: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 1500 seconds was requested on the command line. Forcing timeout to be 1500 seconds.
-- Testing: 10814 of 10833 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: llvm-libc++-shared.cfg.in :: std/thread/futures/futures.async/thread_create_failure.pass.cpp (8573 of 10814)
******************** TEST 'llvm-libc++-shared.cfg.in :: std/thread/futures/futures.async/thread_create_failure.pass.cpp' FAILED ********************
Exit Code: 99

Command Output (stdout):
--
# COMPILED WITH
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/std/thread/futures/futures.async/thread_create_failure.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings  -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/std/thread/futures/futures.async/thread_create_failure.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# note: command had no output on stdout or stderr
# EXECUTED AS
/usr/bin/python3 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir --  /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# executed command: /usr/bin/python3 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir -- /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | ==2882515==LeakSanitizer has encountered a fatal error.
# | ==2882515==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
# | ==2882515==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
# `-----------------------------
# error: command failed with exit status: 99

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
121.59s: llvm-libc++-shared.cfg.in :: std/utilities/charconv/charconv.msvc/test.pass.cpp
114.53s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_copy.pass.cpp
111.97s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit_return_type.pass.cpp
81.63s: llvm-libc++abi-shared.cfg.in :: catch_multi_level_pointer.pass.cpp
81.44s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_weak.pass.cpp
80.99s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_strong.pass.cpp
67.58s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit.pass.cpp
63.03s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.sorting/alg.sort/stable.sort/stable_sort.pass.cpp
61.04s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.range.pass.cpp
58.97s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_bitwise_operators.pass.cpp
57.63s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_arith_operators.pass.cpp
57.56s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.iterator.pass.cpp
53.23s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp
Step 10 (stage2/hwasan check-cxx) failure: stage2/hwasan check-cxx (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{cxx} substitution: '/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{flags} substitution: '-pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{compile_flags} substitution: '-nostdinc++ -I %{target-include-dir} -I %{include-dir} -I %{libcxx-dir}/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{link_flags} substitution: '-lc++experimental -nostdlib++ -L %{lib-dir} -Wl,-rpath,%{lib-dir} -lc++ -latomic'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{benchmark_flags} substitution: '-I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/include -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/lib -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/benchmarks/google-benchmark/lib64 -l benchmark'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{exec} substitution: '%{executor} --execdir %T -- '
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) All available features: add-latomic-workaround, buildhost=linux, c++26, c++experimental, can-create-symlinks, character-conversion-warnings, clang, clang-21, clang-21.0, clang-21.0.0, diagnose-if-support, enable-benchmarks=no, gcc-style-warnings, glibc-old-ru_RU-decimal-point, has-1024-bit-atomics, has-64-bit-atomics, has-fblocks, has-fconstexpr-steps, has-unix-headers, hwasan, large_tests, libcpp-abi-version=1, libcpp-hardening-mode=none, libcpp-has-no-availability-markup, libcpp-has-thread-api-pthread, linux, lsan, objective-c++, optimization=none, sanitizer-new-delete, std-at-least-c++03, std-at-least-c++11, std-at-least-c++14, std-at-least-c++17, std-at-least-c++20, std-at-least-c++23, std-at-least-c++26, stdlib=libc++, stdlib=llvm-libc++, target=aarch64-unknown-linux-gnu, thread-safety, verify-support
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/llvm/utils/lit/lit/main.py:73: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 1500 seconds was requested on the command line. Forcing timeout to be 1500 seconds.
-- Testing: 10814 of 10833 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70..
FAIL: llvm-libc++-shared.cfg.in :: std/thread/futures/futures.async/thread_create_failure.pass.cpp (8573 of 10814)
******************** TEST 'llvm-libc++-shared.cfg.in :: std/thread/futures/futures.async/thread_create_failure.pass.cpp' FAILED ********************
Exit Code: 99

Command Output (stdout):
--
# COMPILED WITH
/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/std/thread/futures/futures.async/thread_create_failure.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings  -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/std/thread/futures/futures.async/thread_create_failure.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=hwaddress -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/test/support -std=c++26 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wshift-negative-value -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -Wno-nullability-completeness -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# note: command had no output on stdout or stderr
# EXECUTED AS
/usr/bin/python3 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir --  /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# executed command: /usr/bin/python3 /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir -- /home/b/sanitizer-aarch64-linux-bootstrap-hwasan/build/libcxx_build_hwasan/libcxx/test/std/thread/futures/futures.async/Output/thread_create_failure.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | ==2882515==LeakSanitizer has encountered a fatal error.
# | ==2882515==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
# | ==2882515==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
# `-----------------------------
# error: command failed with exit status: 99

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
121.59s: llvm-libc++-shared.cfg.in :: std/utilities/charconv/charconv.msvc/test.pass.cpp
114.53s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_copy.pass.cpp
111.97s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit_return_type.pass.cpp
81.63s: llvm-libc++abi-shared.cfg.in :: catch_multi_level_pointer.pass.cpp
81.44s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_weak.pass.cpp
80.99s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_strong.pass.cpp
67.58s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit.pass.cpp
63.03s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.sorting/alg.sort/stable.sort/stable_sort.pass.cpp
61.04s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.range.pass.cpp
58.97s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_bitwise_operators.pass.cpp
57.63s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_arith_operators.pass.cpp
57.56s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.iterator.pass.cpp
53.23s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp

```

</details>

https://github.com/llvm/llvm-project/pull/130145