Re: [r16-6205 Regression] FAIL: 26_numerics/random/negative_binomial_distribution/operators/58302.cc -std=gnu++20 (test for excess errors) on Linux/x86_64

There were many patches fixing generate_canonical merged including ones
that landed today,
and -m32 works correctly on the trunk for me. Could you please double check?

I think most relevant would be this one:
commit 9614fe95eb33f8ff783b899049f61f74373ff982
Author: Jonathan Wakely <[email protected]>
Date:   Wed Dec 17 18:36:36 2025 +0000

    libstdc++: Fix up std::generate_canonical for 32-bit arches



On Fri, Dec 19, 2025 at 5:26 PM Haochen Jiang <[email protected]>
wrote:

> On Linux/x86_64,
>
> 837c21e1aab850126e91eee9b8944aa2baca9ad5 is the first bad commit
> commit 837c21e1aab850126e91eee9b8944aa2baca9ad5
> Author: Tomasz Kamiński <[email protected]>
> Date:   Wed Dec 17 10:32:54 2025 +0100
>
>     libstdc++: Make declaration and definition of generate_canonical
> consistent.
>
> caused
>
> FAIL: 26_numerics/random/discrete_distribution/operators/call-default.cc
> -std=gnu++20 (test for excess errors)
> FAIL:
> 26_numerics/random/negative_binomial_distribution/operators/58302.cc
> -std=gnu++20 (test for excess errors)
>
> with GCC configured with
>
> ../../gcc/configure
> --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-6205/usr
> --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
> --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet
> --without-isl --enable-libmpx x86_64-linux --disable-bootstrap
>
> To reproduce:
>
> $ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
> RUNTESTFLAGS="conformance.exp=26_numerics/random/discrete_distribution/operators/call-default.cc
> --target_board='unix{-m32}'"
> $ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
> RUNTESTFLAGS="conformance.exp=26_numerics/random/discrete_distribution/operators/call-default.cc
> --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
> RUNTESTFLAGS="conformance.exp=26_numerics/random/negative_binomial_distribution/operators/58302.cc
> --target_board='unix{-m32}'"
> $ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
> RUNTESTFLAGS="conformance.exp=26_numerics/random/negative_binomial_distribution/operators/58302.cc
> --target_board='unix{-m32\ -march=cascadelake}'"
>
> (Please directly reply to this email for question about this report.)
> (If you met problems with cascadelake related, disabling AVX512F in
> command line might save that.)
> (However, please make sure that there is no potential problems with
> AVX512.)
>
>