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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/107508] New: Invalid bounds due to bogus reallocation
 on assignment with KIND=4 characters
Date: Wed, 02 Nov 2022 13:13:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: burnus at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107508

            Bug ID: 107508
           Summary: Invalid bounds due to bogus reallocation on assignment
                    with KIND=3D4 characters
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
  Target Milestone: ---

In the following code, the bounds change during the assignment
but I believe the RHS and the LHS have the same shape and length parameters.

As it works with kind=3D4, I assume that there is a missing '*4' in the size
calculation.

! ------------------

implicit none
character(len=3D:,kind=3D4), allocatable :: a4str(:), a4str2
allocate(character(len=3D7,kind=3D4) :: a4str(-2:3))

if (lbound(a4str,1) /=3D -2) error stop
if (ubound(a4str,1) /=3D 3) error stop

a4str =3D [4_"sf456aq", 4_"3dtzu24", 4_"_4fh7sm", 4_"=3Dff85s7", 4_"j=3D8af=
4d",
4_".,A%Fsz"]

print *, lbound(a4str), ubound(a4str)  ! expected (-2:3) - actually: (1:6)

if (lbound(a4str,1) /=3D -2) error stop
if (ubound(a4str,1) /=3D 3) error stop
end=