[Linaro-TCWG-CI] gcc-16-8385-gc9525a790291: 3 regressions on aarch64

[ci_notify@linaro.org]

Dear contributor,

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

In  aarch64 native, after:
  | commit gcc-16-8385-gc9525a790291
  | Author: Jonathan Wakely <jwakely@redhat.com>
  | Date:   Mon Mar 30 12:13:39 2026 +0100
  | 
  |     libstdc++: Rename saturation arithmetic for C++26 (P4052R0)
  |     
  |     Last week in Croydon we approved P4052R0 to rename std::add_sat etc. for
  |     C++26
  |     
  | ... 16 lines of the commit log omitted.

Produces 3 regressions:
  | 
  | regressions.sum:
  | Running g++:g++.dg/modules/modules.exp ...
  | FAIL: g++.dg/modules/compile-std1.C -std=c++26 (test for excess errors)
  | FAIL: g++.dg/modules/compile-std1.C module-cmi std (gcm.cache/std.gcm)
  | FAIL: g++.dg/modules/compile-std1.C module-cmi std.compat (gcm.cache/std.compat.gcm)

Used configuration :
 *CI config* tcwg_gcc_check aarch64-linux-gnu
 *configure and test flags:* none, autodetected on aarch64-unknown-linux-gnu--disable-multilib --enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419 --with-arch=armv8-a

We track this bug report under https://linaro.atlassian.net/browse/GNU-1867. 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.

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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 *.log.1.xz files in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10034/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-aarch64-build/builds/10034/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10034/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10034/archive/artifacts
Reference build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10033/archive/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/c9525a790291bb924ac5d9887dd1f57e76a66a03/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt

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