[Linaro-TCWG-CI] gcc-16-1550-g9244ea4bf556: Failure on aarch64

Dear contributor,

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

In  master-aarch64, after:
  | commit gcc-16-1550-g9244ea4bf556
  | Author: Andrew MacLeod <[email protected]>
  | Date:   Mon Jun 16 15:41:47 2025 -0400
  | 
  |     Snap subrange boundries to bitmask constraints.
  |     
  |     Ensure all subrange endpoints conform to the bitmask.
  |     
  |             PR tree-optimization/120661
  | ... 9 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe binutils:
  | 1
  | # build_abe gcc:
  | 2
  | # build_abe linux:
  | 4
  | # build_abe glibc:
  | # FAILED
  | # build_abe gdb:
  | # First few build errors in logs:
  | # 00:02:30 fnmatch_loop.c:546:57: error: ‘idx’ may be used uninitialized [-Werror=maybe-uninitialized]
  | # 00:02:30 fnmatch_loop.c:758:41: error: ‘idx’ may be used uninitialized [-Werror=maybe-uninitialized]
  | # 00:02:31 fnmatch_loop.c:544:54: error: ‘wextra’ may be used uninitialized [-Werror=maybe-uninitialized]
  | # 00:02:31 fnmatch_loop.c:749:50: error: ‘wextra’ may be used uninitialized [-Werror=maybe-uninitialized]
  | # 00:02:32 make[2]: *** [../o-iterator.mk:9: /home/tcwg-buildslave/workspace/tcwg_gnu_0/abe/builds/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/glibc-glibc.git~master/posix/fnmatch.o] Error 1
  | # 00:02:32 make[1]: *** [Makefile:484: posix/subdir_lib] Error 2
  | # 00:02:32 make: *** [Makefile:20: all] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe binutils:
  | 1
  | # build_abe gcc:
  | 2
  | # build_abe linux:
  | 4
  | # build_abe glibc:
  | 5
  | # build_abe gdb:
  | 6

Used configuration :
 *CI config* tcwg_gnu_native_build 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-1608. Please let us know if you have a fix.

If you have any questions regarding this report, please ask on [email protected] 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
 * https://ci.linaro.org/job/tcwg_gnu_native_build--master-aarch64-build/1088/artifact/artifacts/
The full lists of regressions and improvements as well as configure and make commands are in
 * https://ci.linaro.org/job/tcwg_gnu_native_build--master-aarch64-build/1088/artifact/artifacts/notify/

Current build   : https://ci.linaro.org/job/tcwg_gnu_native_build--master-aarch64-build/1088/artifact/artifacts
Reference build : https://ci.linaro.org/job/tcwg_gnu_native_build--master-aarch64-build/1087/artifact/artifacts

Instruction to reproduce the build : https://gitlab.com/Linaro/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/9244ea4bf556381d3f7fb66154dc8944ebeb005c/tcwg_gnu_native_build/master-aarch64/reproduction_instructions.txt

Full commit : See in git+ssh://[email protected]/git/gcc.git