[Linaro-TCWG-CI] gcc-17-383-g1a06a37611e: Failure on aarch64

Dear contributor,

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

In bootstrap_build master-aarch64-bootstrap_debug, after:
  | commit gcc-17-383-g1a06a37611e
  | Author: Roger Sayle <[email protected]>
  | Date:   Thu May 7 18:46:37 2026 +0100
  | 
  |     PR middle-end/122871: Doubleword multiplication improvements
  |     
  |     This patch resolves PR middle-end/122871 by improving RTL expansion of
  |     doubleword multiplications.  The main change is to synth_mult adding
  |     support for the case where the constant being multiplied has BITS_PER_WORD
  | ... 64 lines of the commit log omitted.

Produces Failure:
  | Results changed to
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap_debug:
  | # FAILED
  | # First few build errors in logs:
  | # 00:24:37 /home/tcwg-buildslave/workspace/tcwg_gnu_0/abe/snapshots/gcc.git~master/gcc/expmed.h:398:61: error: array subscript -1 is below array bounds of ‘int [64]’ [-Werror=array-bounds=]
  | # 00:24:50 make[3]: *** [Makefile:1217: expmed.o] Error 1
  | # 00:24:50 make[2]: *** [Makefile:5182: all-stage2-gcc] Error 2
  | # 00:24:50 make[1]: *** [Makefile:26490: stage2-bubble] Error 2
  | # 00:24:50 make: *** [Makefile:1140: all] Error 2
  | 
  | From
  | # reset_artifacts:
  | -10
  | # true:
  | 0
  | # build_abe bootstrap_debug:
  | 1

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

We track this bug report under https://linaro.atlassian.net/browse/Please specify 'Project' and 'IssueType'.. 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
 * http://54.172.246.49:9090/jobs/tcwg_bootstrap_build--master-aarch64-bootstrap_debug-build/builds/10038/archive/artifacts/
The full lists of regressions and improvements as well as configure and make commands are in
 * http://54.172.246.49:9090/jobs/tcwg_bootstrap_build--master-aarch64-bootstrap_debug-build/builds/10038/archive/artifacts/notify/

Current build   : http://54.172.246.49:9090/jobs/tcwg_bootstrap_build--master-aarch64-bootstrap_debug-build/builds/10038/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_bootstrap_build--master-aarch64-bootstrap_debug-build/builds/10037/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/1a06a37611e3b27889c595a17df13f6d27202a95/tcwg_bootstrap_build/master-aarch64-bootstrap_debug/reproduction_instructions.txt

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