Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find some details below.

In arm-eabi cortex-m55 hard, after: | commit newlib-4.6.0-5-g4356ccd02c | Author: Thomas Wolff towo@towo.net | Date: Mon Feb 2 00:00:00 2026 +0000 | | towupper/towlower: handle Turkic language special casing | | For case conversion, Unicode has a standard mapping and a separate | list of mapping rules for special cases (file SpecialCasing.txt), | some of which are also language-dependent (as configured via locale). | ... 10 lines of the commit log omitted.

Produces 34 regressions: | | regressions.sum: | Running libstdc++:libstdc++-dg/conformance.exp ... | FAIL: 22_locale/ctype/is/wchar_t/1.cc -std=gnu++20 execution test | FAIL: 22_locale/ctype/is/wchar_t/11740.cc -std=gnu++20 execution test | FAIL: 22_locale/ctype/to/wchar_t/1.cc -std=gnu++20 execution test | FAIL: 22_locale/time_get/get/wchar_t/1.cc -std=gnu++20 execution test | ... and 30 more

Used configuration : *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8.1-m.main+mve.fp+fp.dp -mtune=cortex-m55 -mfloat-abi=hard -mfpu=auto *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-arch=armv8.1-m.main+mve.fp+fp.dp --with-float=hard --target_board=-mthumb/-march=armv8.1-m.main+mve.fp+fp.dp/-mtune=cortex-m55/-mfloat-abi=hard/-mfpu=auto qemu-cpu=cortex-m55

We track this bug report under https://linaro.atlassian.net/browse/GNU-1849. Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list.

-----------------8<--------------------------8<--------------------------8<--------------------------

The information below contains the details of the failures, and the ways to reproduce a debug environment:

You can find the failure logs in *.log.1.xz files in * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_ea... The full lists of regressions and improvements as well as configure and make commands are in * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_ea... The list of [ignored] baseline and flaky failures are in * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_ea...

Current build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_ea... Reference build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m55_hard_ea...

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/newlib...

Full commit : https://sourceware.org/git/?p=newlib-cygwin.git%3Ba=commitdiff%3Bh=4356ccd02...