Dear contributor,

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

In  arm-eabi cortex-m33 hard, after:
  | commit gcc-16-6177-g866bc8a9214
  | Author: Nathan Myers <ncm@cantrip.org>
  | Date:   Wed Aug 6 22:38:44 2025 -0400
  | 
  |     libstdc++: New generate_canonical impl (P0952, LWG2524) [PR119739]
  |     
  |     Implement P0952R2 "A new specification for
  |     std::generate_canonical", fixing issue LWG 2524.
  |     
  | ... 46 lines of the commit log omitted.

Produces 85 regressions:
  | 
  | regressions.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: 26_numerics/random/bernoulli_distribution/operators/serialize.cc -std=gnu++17 (test for excess errors)
  | UNRESOLVED: 26_numerics/random/bernoulli_distribution/operators/serialize.cc -std=gnu++17 compilation failed to produce executable
  | FAIL: 26_numerics/random/binomial_distribution/114359.cc -std=gnu++17 (test for excess errors)
  | UNRESOLVED: 26_numerics/random/binomial_distribution/114359.cc -std=gnu++17 compilation failed to produce executable
  | ... and 81 more

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv8-m.main+dsp+fp -mtune=cortex-m33 -mfloat-abi=hard -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib --with-mode=thumb --with-cpu=cortex-m33 --with-float=hard --target_board=-mthumb/-march=armv8-m.main+dsp+fp/-mtune=cortex-m33/-mfloat-abi=hard/-mfpu=auto qemu-cpu=cortex-m33

We track this bug report under https://linaro.atlassian.net/browse/GNU-1788. 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_m33_hard_eabi-build/696/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_m33_hard_eabi-build/696/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_m33_hard_eabi-build/696/artifact/artifacts/sumfiles/xfails.xfail

Current build   : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m33_hard_eabi-build/696/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m33_hard_eabi-build/695/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/866bc8a9214b1d00402fdbdcb976688a95c98f65/tcwg_gnu_embed_check_gcc/master-thumb_m33_hard_eabi/reproduction_instructions.txt

Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git