Dear contributor,

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

In bootstrap_build master-arm-bootstrap_O3, after:
  | commit gcc-16-6185-g487bd3ba4f1f
  | Author: Jonathan Wakely <[email protected]>
  | Date:   Wed Dec 10 14:26:17 2025 +0000
  | 
  |     libstdc++: Optimize compilation time for signed/unsigned integer traits
  |     
  |     Replace the O(n) definitions using __is_one_of with constant-time
  |     checks that look for a static member in the __is_integral_helper class
  |     template. That class template is already specialized for every signed
  | ... 20 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap_O3:
  | # FAILED
  | # First few build errors in logs:
  | # 00:49:05 
/home/tcwg-buildslave/workspace/tcwg_gnu_3/abe/builds/armv8l-unknown-linux-gnueabihf/armv8l-unknown-linux-gnueabihf/gcc-gcc.git~master-stage2/prev-armv8l-unknown-linux-gnueabihf/libstdc++-v3/include/bits/stl_bvector.h:183:9:
 internal compiler error: Segmentation fault
  | # 00:49:05 make[3]: *** [Makefile:1216: text-art/ruler.o] Error 1
  | # 00:49:05 make[2]: *** [Makefile:5200: all-stage3-gcc] Error 2
  | # 00:49:05 make[1]: *** [Makefile:26599: stage3-bubble] Error 2
  | # 00:49:05 make: *** [Makefile:1127: all] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap_O3:
  | 1

Used configuration :
 *CI config* tcwg_bootstrap_build master-arm-bootstrap_O3
 *configure and test flags:* none, autodetected on 
armv8l-unknown-linux-gnueabihf

We track this bug report under https://linaro.atlassian.net/browse/GNU-1783. 
Please let us know if you have a fix.

If you have any questions regarding this report, please ask on 
[email protected] 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
 * 
https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1019/artifact/artifacts/
The full lists of regressions and improvements as well as configure and make 
commands are in
 * 
https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1019/artifact/artifacts/notify/

Current build   : 
https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1019/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1018/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/487bd3ba4f1f179be42e3bb13e009d9ff8fc053e/tcwg_bootstrap_build/master-arm-bootstrap_O3/reproduction_instructions.txt

Full commit : See in git+ssh://[email protected]/git/gcc.git

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