[Bug fortran/67740] New: Wrong association status of allocatable character pointer in derived types

[baradi09 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67740

            Bug ID: 67740
           Summary: Wrong association status of allocatable character
                    pointer in derived types
           Product: gcc
           Version: 5.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: baradi09 at gmail dot com
  Target Milestone: ---

Created attachment 36405
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36405&action=edit
Self containing example demonstrating the issue.

Dear all,

I've found the following problem with gfortran 5.2.0: Let's take a derived type
(Base) with a pointer component (string) of the type deferred length character,
one instance of this derived type and two pointers (p1 and p2) pointing to this
one instance. While 'associated(p1, p2)' correctly detects the equivalence of
the two pointers, 'associated(p1%string, p2%string)' wrongly indicates an
inequivalence of the pointer components.

Best,

Bálint