<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/119047>119047</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
[libc++] locale.numpunct.byname/grouping.pass.cpp tests fail with glibc 2.39
</td>
</tr>
<tr>
<th>Labels</th>
<td>
libc++
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
rprichard
</td>
</tr>
</table>
<pre>
Test failures:
```
Command Output (stdout):
--
# COMPILED WITH
/x/master-plus-llvm/out/stage2/./bin/clang++ /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/grouping.pass.cpp -pthread --target=x86_64-unknown-linux-gnu -nostdinc++ -I /x/master-plus-llvm/out/stage2/include/x86_64-unknown-linux-gnu/c++/v1 -I /x/master-plus-llvm/out/stage2/include/c++/v1 -I /x/master-plus-llvm/out/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 -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 -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 /x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -lc++ -latomic -o /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# executed command: /x/master-plus-llvm/out/stage2/./bin/clang++ /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/grouping.pass.cpp -pthread --target=x86_64-unknown-linux-gnu -nostdinc++ -I /x/master-plus-llvm/out/stage2/include/x86_64-unknown-linux-gnu/c++/v1 -I /x/master-plus-llvm/out/stage2/include/c++/v1 -I /x/master-plus-llvm/out/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 -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 -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 /x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -lc++ -latomic -o /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# EXECUTED AS
/x/master-plus-llvm/prebuilts/python/linux-x86/bin/python3 /x/master-plus-llvm/out/llvm-project/libcxx/utils/run.py --execdir /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir -- /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# executed command: /x/master-plus-llvm/prebuilts/python/linux-x86/bin/python3 /x/master-plus-llvm/out/llvm-project/libcxx/utils/run.py --execdir /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir -- /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | t.tmp.exe: /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/category.monetary/locale.moneypunct.byname/grouping.pass.cpp:99: int main(int, char **): Assertion `f.grouping() == us_grouping' failed.
# `-----------------------------
# error: command failed with exit status: 250
--
********************
Testing: 0.. 10.. 20.. 30.. 40.. 50.
FAIL: llvm-libc++-shared.cfg.in :: std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/grouping.pass.cpp (5560 of 9741)
******************** TEST 'llvm-libc++-shared.cfg.in :: std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/grouping.pass.cpp' FAILED ********************
Exit Code: 250
Command Output (stdout):
--
# COMPILED WITH
/x/master-plus-llvm/out/stage2/./bin/clang++ /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/grouping.pass.cpp -pthread --target=x86_64-unknown-linux-gnu -nostdinc++ -I /x/master-plus-llvm/out/stage2/include/x86_64-unknown-linux-gnu/c++/v1 -I /x/master-plus-llvm/out/stage2/include/c++/v1 -I /x/master-plus-llvm/out/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 -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 -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 /x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -lc++ -latomic -o /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# executed command: /x/master-plus-llvm/out/stage2/./bin/clang++ /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/grouping.pass.cpp -pthread --target=x86_64-unknown-linux-gnu -nostdinc++ -I /x/master-plus-llvm/out/stage2/include/x86_64-unknown-linux-gnu/c++/v1 -I /x/master-plus-llvm/out/stage2/include/c++/v1 -I /x/master-plus-llvm/out/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 -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 -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 /x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -Wl,-rpath,/x/master-plus-llvm/out/stage2/./lib/x86_64-unknown-linux-gnu -lc++ -latomic -o /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# EXECUTED AS
/x/master-plus-llvm/prebuilts/python/linux-x86/bin/python3 /x/master-plus-llvm/out/llvm-project/libcxx/utils/run.py --execdir /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir -- /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# executed command: /x/master-plus-llvm/prebuilts/python/linux-x86/bin/python3 /x/master-plus-llvm/out/llvm-project/libcxx/utils/run.py --execdir /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir -- /x/master-plus-llvm/out/stage2/runtimes/runtimes-x86_64-unknown-linux-gnu-bins/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/Output/grouping.pass.cpp.dir/t.tmp.exe
# .---command stderr------------
# | t.tmp.exe: /x/master-plus-llvm/out/llvm-project/libcxx/test/std/localization/locale.categories/facet.numpunct/locale.numpunct.byname/grouping.pass.cpp:54: int main(int, char **): Assertion `np.grouping() == "\3\3"' failed.
# `-----------------------------
# error: command failed with exit status: 250
```
These libc++ tests are expecting `localeconv()->grouping` for `en_US.UTF-8` to be `\3\3`, but glibc changed its value to `\3` in glibc 2.39:
https://patchwork.ozlabs.org/project/glibc/patch/20240124164229.1743477-1-mfabian@redhat.com/
https://sourceware.org/bugzilla/show_bug.cgi?id=31205
(These two test failures also appear in https://github.com/llvm/llvm-project/issues/100886, which was closed for lack of information.)
</pre>
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