On Thu, May 14, 2026 at 7:43 PM <[email protected]> wrote:

> Dear contributor,
>
> Our automatic CI has detected problems related to your patch(es). Please
> find some details below.
>
> In  armv8l-unknown-linux-gnueabihf native, after:
>   | commit gcc-17-496-gda540dc6d763
>   | Author: Tomasz Kamiński <[email protected]>
>   | Date:   Wed May 13 14:51:02 2026 +0200
>   |
>   |     libstdc++: Test for unsupported engine range for 128bits floating
> points [PR119739]
>   |
>   |     This patch add test illustrating, that after implementing P0952 "A
> new specification for
>   |     std::generate_canonical",  generators, that emit range of
> non-power-of-two size, that
>   |     span over B bits, are not supported in combination with 128bits
> integer are not
>   | ... 16 lines of the commit log omitted.
>
> Produces 7 regressions:
>   |
>   | regressions.sum:
>   | Running libstdc++:libstdc++-dg/conformance.exp ...
>   | FAIL:
> 26_numerics/random/uniform_real_distribution/operators/gencanon_eng_neg.cc
> -std=gnu++20  (test for errors, line 57)
>   | FAIL:
> 26_numerics/random/uniform_real_distribution/operators/gencanon_eng_neg.cc
> -std=gnu++20  (test for errors, line 58)
>   | FAIL:
> 26_numerics/random/uniform_real_distribution/operators/gencanon_eng_neg.cc
> -std=gnu++20  (test for errors, line 65)
>   | FAIL:
> 26_numerics/random/uniform_real_distribution/operators/gencanon_eng_neg.cc
> -std=gnu++20  (test for errors, line 66)
>   | ... and 3 more
>
> Used configuration :
>  *CI config* tcwg_gcc_check armv8l-unknown-linux-gnueabihf
>  *configure and test flags:* none, autodetected on
> armv8l-unknown-linux-gnueabihf--disable-multilib --with-float=hard
> --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a
> --with-fpu=neon-fp-armv8
>
> We track this bug report under
> https://linaro.atlassian.net/browse/GNU-1902. Please let us know if you
> have a fix.
>
Thanks for the report. This should already be fixed on trunk by
https://gcc.gnu.org/cgit/gcc/commit/?id=5d17eec7d83445ba4f960c81c386be33baee52a4

libstdc++: Mark gencanon_eng_neg test as unsupported if __float128 is not
available



> 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 *.log.1.xz files in
>  *
> http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10207/archive/artifacts/00-sumfiles/
> The full lists of regressions and improvements as well as configure and
> make commands are in
>  *
> http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10207/archive/artifacts/notify/
> The list of [ignored] baseline and flaky failures are in
>  *
> http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10207/archive/artifacts/sumfiles/xfails.xfail
>
> Current build   :
> http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10207/archive/artifacts/
> Reference build :
> http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-arm-build/builds/10206/archive/artifacts/
>
> Instruction to reproduce the build :
> https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/da540dc6d7634a708768008d23b3cee9110a7121/tcwg_gcc_check/master-arm/reproduction_instructions.txt
>
> Full commit : See in git+ssh://[email protected]/git/gcc.git
>
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