[libcxx-commits] [libcxx] [libc++][format] P3953R3: Rename `std::runtime_format` (PR #189657)

Sun Apr 12 04:02:32 PDT 2026

llvm-ci wrote:

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

Full details are available at: https://lab.llvm.org/buildbot/#/builders/94/builds/16837

<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-msan/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-msan/build/llvm_build0/bin/clang++'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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=memory'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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-msan/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-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/include -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/lib -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/lib64 -l benchmark'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{exec} substitution: '%{executor} --execdir %{temp} -- '
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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-23, clang-23.0, clang-23.0.0, diagnose-if-support, enable-benchmarks=no, gcc-style-warnings, has-1024-bit-atomics, has-64-bit-atomics, has-fblocks, has-fconstexpr-steps, has-unix-headers, large_tests, libcpp-abi-version=1, libcpp-hardening-mode=none, libcpp-has-no-availability-markup, libcpp-has-thread-api-pthread, linux, msan, 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, verify-support
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/main.py:74: 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: 11385 of 11402 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90
FAIL: llvm-libc++-shared.cfg.in :: std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp (10801 of 11385)
******************** TEST 'llvm-libc++-shared.cfg.in :: std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp' FAILED ********************
Exit Code: 250

Command Output (stdout):
--
# COMPILED WITH
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/test/std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=memory -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings  -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/test/std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=memory -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# note: command had no output on stdout or stderr
# EXECUTED AS
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_venv/bin/python /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir --  /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_venv/bin/python /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir -- /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | libc++abi: terminating due to uncaught exception of type std::__1::format_error: The argument index value is too large for the number of arguments supplied
# `-----------------------------
# error: command failed with exit status: 250

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
250.15s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_weak.pass.cpp
245.62s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_strong.pass.cpp
166.52s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_copy.pass.cpp
107.66s: llvm-libc++-shared.cfg.in :: std/input.output/syncstream/osyncstream/thread/several_threads.pass.cpp
93.45s: llvm-libc++-shared.cfg.in :: std/containers/container.adaptors/flat.map/flat.map.capacity/size.pass.cpp
88.65s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.range.pass.cpp
88.10s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.sorting/alg.sort/stable.sort/stable_sort.pass.cpp
85.73s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp
82.01s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_bitwise_operators.pass.cpp
79.01s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.iterator.pass.cpp
76.34s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_arith_operators.pass.cpp
71.51s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_unary.pass.cpp
70.45s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit_return_type.pass.cpp
67.17s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_assignment.pass.cpp
65.99s: llvm-libc++-shared.cfg.in :: std/ranges/range.adaptors/range.join.with/range.join.with.view/end.pass.cpp
Step 10 (stage2/msan check-cxx) failure: stage2/msan check-cxx (failure)
...
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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-msan/build/llvm_build0/bin/clang++'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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=memory'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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-msan/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-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/include -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/lib -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/benchmarks/google-benchmark/lib64 -l benchmark'
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/libcxx/test/config.py:24: note: (llvm-libc++-shared.cfg.in) Using %{exec} substitution: '%{executor} --execdir %{temp} -- '
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/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-23, clang-23.0, clang-23.0.0, diagnose-if-support, enable-benchmarks=no, gcc-style-warnings, has-1024-bit-atomics, has-64-bit-atomics, has-fblocks, has-fconstexpr-steps, has-unix-headers, large_tests, libcpp-abi-version=1, libcpp-hardening-mode=none, libcpp-has-no-availability-markup, libcpp-has-thread-api-pthread, linux, msan, 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, verify-support
llvm-lit: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/utils/lit/lit/main.py:74: 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: 11385 of 11402 tests, 72 workers --
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90
FAIL: llvm-libc++-shared.cfg.in :: std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp (10801 of 11385)
******************** TEST 'llvm-libc++-shared.cfg.in :: std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp' FAILED ********************
Exit Code: 250

Command Output (stdout):
--
# COMPILED WITH
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/test/std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=memory -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings  -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build0/bin/clang++ /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/test/std/utilities/format/format.functions/format.locale.dynamic_format.pass.cpp -pthread --target=aarch64-unknown-linux-gnu -g -fno-omit-frame-pointer -fsanitize=memory -nostdinc++ -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/include/c++/v1 -I /home/b/sanitizer-aarch64-linux-bootstrap-msan/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 -flax-vector-conversions=none -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -Wuser-defined-warnings -lc++experimental -nostdlib++ -L /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -Wl,-rpath,/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test-suite-install/lib -lc++ -latomic -o /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# note: command had no output on stdout or stderr
# EXECUTED AS
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_venv/bin/python /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir --  /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# executed command: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_venv/bin/python /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/libcxx/utils/run.py --execdir /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir -- /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/libcxx_build_msan/libcxx/test/std/utilities/format/format.functions/Output/format.locale.dynamic_format.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | libc++abi: terminating due to uncaught exception of type std::__1::format_error: The argument index value is too large for the number of arguments supplied
# `-----------------------------
# error: command failed with exit status: 250

--

********************
Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90.. 
Slowest Tests:
--------------------------------------------------------------------------
250.15s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_weak.pass.cpp
245.62s: llvm-libc++-shared.cfg.in :: std/atomics/atomics.ref/compare_exchange_strong.pass.cpp
166.52s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_copy.pass.cpp
107.66s: llvm-libc++-shared.cfg.in :: std/input.output/syncstream/osyncstream/thread/several_threads.pass.cpp
93.45s: llvm-libc++-shared.cfg.in :: std/containers/container.adaptors/flat.map/flat.map.capacity/size.pass.cpp
88.65s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.range.pass.cpp
88.10s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.sorting/alg.sort/stable.sort/stable_sort.pass.cpp
85.73s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.nonmodifying/alg.ends_with/ranges.ends_with.pass.cpp
82.01s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_bitwise_operators.pass.cpp
79.01s: llvm-libc++-shared.cfg.in :: std/algorithms/alg.modifying.operations/alg.transform/ranges.transform.binary.iterator.pass.cpp
76.34s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_arith_operators.pass.cpp
71.51s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.class/simd_unary.pass.cpp
70.45s: llvm-libc++-shared.cfg.in :: std/utilities/variant/variant.visit/visit_return_type.pass.cpp
67.17s: llvm-libc++-shared.cfg.in :: std/experimental/simd/simd.reference/reference_assignment.pass.cpp
65.99s: llvm-libc++-shared.cfg.in :: std/ranges/range.adaptors/range.join.with/range.join.with.view/end.pass.cpp

```

</details>

https://github.com/llvm/llvm-project/pull/189657