[Linaro-TCWG-CI] gcc-15-8035-g7ee31bc9276: 2 regressions on master-thumb_m23_soft_eabi

[ci_notify@linaro.org]

Dear contributor,

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

In  arm-eabi cortex-m23 soft, after:
  | commit gcc-15-8035-g7ee31bc9276
  | Author: Jonathan Wakely <jwakely@redhat.com>
  | Date:   Thu Mar 13 13:34:55 2025 +0000
  | 
  |     libstdc++: Implement <stdbit.h> for C++26 (P3370R1)
  |     
  |     This is the first part of the P3370R1 proposal just approved by the
  |     committee in Wrocław. This adds C++ equivalents of the functions added
  |     to C23 by WG14 N3022.
  | ... 16 lines of the commit log omitted.

Produces 2 regressions:
  | 
  | regressions.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: 20_util/stdbit/1.cc -std=gnu++26 (test for excess errors)
  | UNRESOLVED: 20_util/stdbit/1.cc -std=gnu++26 compilation failed to produce executable

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8-m.base -mtune=cortex-m23 -mfloat-abi=soft -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m23 --with-float=soft --target_board=-mthumb/-march=armv8-m.base/-mtune=cortex-m23/-mfloat-abi=soft/-mfpu=auto qemu_cpu=cortex-m33

We track this bug report under https://linaro.atlassian.net/browse/GNU-1543. 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.

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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_m23_soft_eabi-build/298/artifact/artifacts/00-sumfiles/
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_m23_soft_eabi-build/298/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/298/artifact/artifacts/sumfiles/xfails.xfail

Current build   : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/298/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m23_soft_eabi-build/297/artifact/artifacts

Instruction to reproduce the build : https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/7ee31bc92768152e4c900591a051ba48cdd847ae/tcwg_gnu_embed_check_gcc/master-thumb_m23_soft_eabi/reproduction_instructions.txt

Full commit : https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=7ee31bc92768152e4c900591a051ba48cdd847ae