Dear contributor,

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

In  aarch64 native, after:
  | gcc patch https://patchwork.sourceware.org/patch/132687
  | Author: Tomasz Kamiński <tkaminsk@redhat.com>
  | Date:   Sat Apr 4 18:22:18 2026 +0200
  | 
  |     [PATCH v2] libstdc++: Export explicit instantiations for C++20 members of std::string
  |     
  |     The C++20 standard added new starts_with and ends_with members to
  |     std::basic_string, which were not previously instantiated in the library.
  |     This meant that the extern template declarations had to be disabled for
  | ... 31 lines of the commit log omitted.
  | ... applied on top of baseline commit:
  | cbd7c9ad339 doc, i386: Document more CPUs as having CX16 support [PR107337]

Produces 1 regression:
  | 
  | regressions.sum:
  | Running g++:g++.dg/lto/lto.exp ...
  | FAIL: g++.dg/lto/20091022-2 cp_lto_20091022-2_0.o-cp_lto_20091022-2_0.o link, -O3 -flto -Winline

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

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-precommit/builds/10115/archive/artifacts/artifacts.precommit/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-precommit/builds/10115/archive/artifacts/artifacts.precommit/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-precommit/builds/10115/archive/artifacts/artifacts.precommit/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-precommit/builds/10115/archive/artifacts
Reference build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10045/archive/artifacts

Warning: we do not enable maintainer-mode nor automatically update
generated files, which may lead to failures if the patch modifies the
master files.