On Fri, 19 Dec 2025 at 16:40, ci_notify@linaro.org wrote:
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 jwakely@redhat.com | 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 linaro-toolchain@lists.linaro.org mailing list.
Very strange - I don't know why this would trigger a segfault in the compiler.
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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
The full lists of regressions and improvements as well as configure and make commands are in
Current build : https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-buil... Reference build : https://ci.linaro.org/job/tcwg_bootstrap_build--master-arm-bootstrap_O3-buil...
Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sh...
Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git
linaro-toolchain@lists.linaro.org
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Jonathan Wakely