Dear contributor,

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

In  arm-eabi cortex-m3 softfp, after:
  | commit gcc-16-1709-g4b3cefed1a08
  | Author: Tomasz KamiƄski <tkami...@redhat.com>
  | Date:   Tue Jun 24 14:07:46 2025 +0200
  | 
  |     libstdc++: Type-erase chrono-data for formatting [PR110739]
  |     
  |     This patch reworks the formatting for the chrono types, such that they 
are all
  |     formatted in terms of _ChronoData class, that includes all required 
fields.
  |     Populating each required field is performed in formatter for specific 
type,
  | ... 135 lines of the commit log omitted.

Produces 4 regressions:
  | 
  | regressions.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: std/time/format/empty_spec.cc -std=gnu++20 (test for excess errors)
  | FAIL: std/time/format/empty_spec.cc -std=gnu++20 execution test
  | FAIL: std/time/format/empty_spec.cc -std=gnu++26 (test for excess errors)
  | FAIL: std/time/format/empty_spec.cc -std=gnu++26 execution test

Used configuration :
 *CI config* tcwg_gnu_embed_check_gcc arm-eabi -mthumb -march=armv7-m 
-mtune=cortex-m3 -mfloat-abi=softfp -mfpu=auto
 *configure and test flags:* --target arm-eabi --disable-multilib 
--with-mode=thumb --with-cpu=cortex-m3 --with-float=softfp 
--target_board=-mthumb/-march=armv7-m/-mtune=cortex-m3/-mfloat-abi=softfp/-mfpu=auto
 qemu_cpu=cortex-m3

We track this bug report under https://linaro.atlassian.net/browse/GNU-1614. 
Please let us know if you have a fix.

If you have any questions regarding this report, please ask on 
linaro-toolch...@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_m3_softfp_eabi-build/429/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_m3_softfp_eabi-build/429/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_m3_softfp_eabi-build/429/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m3_softfp_eabi-build/429/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gnu_embed_check_gcc--master-thumb_m3_softfp_eabi-build/428/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/Linaro/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/4b3cefed1a08344495fedec4982d85168bd8173f/tcwg_gnu_embed_check_gcc/master-thumb_m3_softfp_eabi/reproduction_instructions.txt

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

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