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

Typo in this email :

We track this bug report under https://linaro.atlassian.net/browse/GNU-1897
. Please let us know if you have a fix.


On Fri, 8 May 2026 at 17:49, <[email protected]> wrote:

> 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.
>
>
> -----------------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
>  *
> 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