[Bug debug/94329] New: gcc-9: error: use_only.f90: ‘-fcompare-debug’ failure (length)

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94329

            Bug ID: 94329
           Summary: gcc-9: error: use_only.f90: ‘-fcompare-debug’ failure
                    (length)
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Fails since GCC 4.9.0:

$ cat use_only.f90
SUBROUTINE r_to_s1b ( s, hinv )
REAL hinv(:,:)     
DO I=1,3
DO J=1,3
S = hinv(i,j)
END DO
END DO
END

$ gcc -Werror -fcompare-debug -O1 -fno-tree-loop-optimize -fwrapv -c
use_only.f90
gcc: error: use_only.f90: ‘-fcompare-debug’ failure (length)