Dear contributor,

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

In bootstrap_check master-aarch64-check_bootstrap_lto, after:
  | commit gcc-16-6183-ge0fa6ea45fbd
  | Author: Jonathan Wakely <jwakely@redhat.com>
  | Date:   Mon Dec 15 16:00:20 2025 +0000
  | 
  |     libstdc++: Update default -std for testsuite
  |     
  |     libstdc++-v3/ChangeLog:
  |     
  |             * testsuite/lib/libstdc++.exp (dg-v3-runtest) Set default_std to
  | ... 3 lines of the commit log omitted.

Produces 149 regressions 5 fixes:
  | 
  | regressions.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: 17_intro/headers/c++1998/all_pedantic_errors.cc -std=gnu++20 (test for excess errors)
  | FAIL: 20_util/shared_ptr/cons/58659.cc -std=gnu++20 (test for excess errors)
  | FAIL: 21_strings/basic_string/requirements/exception/generation_prohibited.cc -std=gnu++20 (test for excess errors)
  | UNRESOLVED: 21_strings/basic_string/requirements/exception/generation_prohibited.cc -std=gnu++20 compilation failed to produce executable
  | ... and 145 more
  | 
  | fixes.sum:
  | Running libstdc++:libstdc++-dg/conformance.exp ...
  | FAIL: 17_intro/headers/c++1998/all_pedantic_errors.cc -std=gnu++17 (test for excess errors)
  | FAIL: 20_util/shared_ptr/cons/58659.cc -std=gnu++17 (test for excess errors)
  | FAIL: 26_numerics/random/pr60037-neg.cc -std=gnu++17  (test for errors, line 3480)
  | FAIL: 26_numerics/random/pr60037-neg.cc -std=gnu++17 (test for excess errors)
  | ... and 1 more

Used configuration :
 *CI config* tcwg_bootstrap_check master-aarch64-check_bootstrap_lto
 *configure and test flags:* none, autodetected on aarch64-unknown-linux-gnu

We track this bug report under https://linaro.atlassian.net/browse/GNU-692. 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.

-----------------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
 * https://ci.linaro.org/job/tcwg_bootstrap_check--master-aarch64-check_bootstrap_lto-build/1397/artifact/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make commands are in
 * https://ci.linaro.org/job/tcwg_bootstrap_check--master-aarch64-check_bootstrap_lto-build/1397/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * https://ci.linaro.org/job/tcwg_bootstrap_check--master-aarch64-check_bootstrap_lto-build/1397/artifact/artifacts/sumfiles/xfails.xfail

Current build   : https://ci.linaro.org/job/tcwg_bootstrap_check--master-aarch64-check_bootstrap_lto-build/1397/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_bootstrap_check--master-aarch64-check_bootstrap_lto-build/1396/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/e0fa6ea45fbd0280ace8803db1bc30a7d069da9e/tcwg_bootstrap_check/master-aarch64-check_bootstrap_lto/reproduction_instructions.txt

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