Dear contributor,

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

In gcc_check master-aarch64, after:
  | commit gcc-16-2065-g8abc2e66be72
  | Author: Jason Merrill <ja...@redhat.com>
  | Date:   Wed Jul 2 05:15:01 2025 -0400
  | 
  |     c++: -Wno-abbreviated-auto-in-template-arg [PR120917]
  |     
  |     In r14-1659 I added a missing error for a Concepts TS feature that we 
were
  |     failing to diagnose, but this PR requests a way to disable that error 
for
  |     code written thinking it was valid.  Which seems reasonable, since it
  | ... 36 lines of the commit log omitted.

Produces 3 regressions:
  | 
  | regressions.sum:
  | Running g++:g++.dg/dg.exp ...
  | UNRESOLVED: g++.dg/cpp1y/lambda-generic-variadic.C -std=c++14 compilation 
failed to produce executable
  | UNRESOLVED: g++.dg/cpp1y/lambda-generic-variadic.C -std=c++17 compilation 
failed to produce executable
  | UNRESOLVED: g++.dg/cpp1y/lambda-generic-variadic.C -std=c++26 compilation 
failed to produce executable

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

We track this bug report under https://linaro.atlassian.net/browse/GNU-1620. 
Please let us know if you have a fix.

If you have any questions regarding this report, please ask on 
linaro-toolch...@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_gcc_check--master-aarch64-build/3965/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_gcc_check--master-aarch64-build/3965/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3965/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3965/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3964/artifact/artifacts

Instruction to reproduce the build : 
https://gitlab.com/Linaro/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/8abc2e66be72a34db8c3cc97e4fbd90b7abae61d/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt

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

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