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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/110658] New: MINVAL/MAXVAL and deferred-length
 character arrays
Date: Thu, 13 Jul 2023 18:26:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110658

            Bug ID: 110658
           Summary: MINVAL/MAXVAL and deferred-length character arrays
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anlauf at gcc dot gnu.org
  Target Milestone: ---

Spin-off from pr110288:

program p
  character(len=3D2), allocatable :: fixed(:)
  character(len=3D:), allocatable :: array(:)
  fixed =3D ["bb", "aa"]
  array =3D ["bb", "aa"]
  print *, minval (fixed) ! OK
  print *, maxval (array) ! runtime error
end

While the MINVAL for the fixed-length character array works fine,
the MAXVAL for the deferred-length character array gives at runtime:

a.out: ../../../gcc-trunk/libgfortran/generated/maxval0_s1.c:68: maxval0_s1:
Assertion `xlen =3D=3D len' failed.

All versions since gcc-8 (when MINVAL/MAXVAL of character was implemented)
fail.=