[Linaro-TCWG-CI] gcc-17-3254-gfbc358491ea: 1 regression on arm

Dear contributor,

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

In  arm-linux-gnueabihf cross, after:
  | commit gcc-17-3254-gfbc358491ea
  | Author: Mikael Morin <[email protected]>
  | Date:   Thu Aug 13 09:40:14 2026 +0200
  | 
  |     fortran: Fix element size in collective subroutines implementation [PR126799]
  |     
  |     The shared memory implementation of collective subroutines uses the array
  |     descriptor span as element size.  This gives a bigger value than the true
  |     size in some cases, as demonstrated in the testcase with a pointer pointing
  | ... 16 lines of the commit log omitted.

Produces 1 regression:
  | 
  | regressions.sum:
  | Running gfortran:gfortran.dg/coarray/caf.exp ...
  | FAIL: gfortran.dg/coarray/collectives_5.f90 -fcoarray=lib -pthread  -O2  -lcaf_shmem -lrt execution test

Used configuration :
 *CI config* tcwg_gnu_cross_check_gcc arm-linux-gnueabihf cross
 *configure and test flags:* --target arm-linux-gnueabihf --disable-multilib --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a

We track this bug report under https://linaro.atlassian.net/browse/GNU-1993. (Require Linaro login) 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 *.log.1.xz files in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10301/archive/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make commands are in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10301/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10301/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10301/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_gnu_cross_check_gcc--master-arm-build/builds/10300/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/fbc358491eac26f6680d738c59c9ce62564988f6/tcwg_gnu_cross_check_gcc/master-arm/reproduction_instructions.txt

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