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-16-6898-g8fad43b7850
  | Author: Tomasz Kamiński <tkaminsk@redhat.com>
  | Date:   Fri Jan 16 14:01:53 2026 +0100
  | 
  |     libstdc++: Use overload operator<=> when provided in relational functors [PR114153]
  |     
  |     The implementation of less<> did not consider the possibility of t < u being
  |     rewritten from overloaded operator<=>. This lead to situation when for t,u that:
  |     * provide overload operator<=>, such that (t < u) is rewritten to (t <=> u) < 0,
  | ... 59 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:
  | # 00:29:39 /home/tcwg-buildslave/workspace/tcwg_gnu_1/abe/builds/armv8l-unknown-linux-gnueabihf/armv8l-unknown-linux-gnueabihf/gcc-gcc.git~master-stage2/armv8l-unknown-linux-gnueabihf/libstdc++-v3/include/bits/streambuf_iterator.h:51:9: internal compiler error: Segmentation fault
  | # 00:29:39 make[6]: *** [Makefile:646: ops.lo] Error 1
  | # 00:29:39 make[5]: *** [Makefile:800: all-recursive] Error 1
  | # 00:29:39 make[4]: *** [Makefile:580: all-recursive] Error 1
  | # 00:29:39 make[3]: *** [Makefile:505: all] Error 2
  | # 00:29:39 make[2]: *** [Makefile:16894: all-stage2-target-libstdc++-v3] Error 2
  | # 00:29:39 make[1]: *** [Makefile:26459: stage2-bubble] Error 2
  | # 00:29:39 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-1827. 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
 * https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1062/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/1062/artifact/artifacts/notify/

Current build   : https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1062/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-build/1061/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/8fad43b7850a99b32c48570fc2a3d8ae5a76542a/tcwg_bootstrap_build/master-arm-bootstrap_O3/reproduction_instructions.txt

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