[Bug fortran/63232] New: Deferred length character field of derived type looses its value when used in subroutine call

[baradi09 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63232

            Bug ID: 63232
           Summary: Deferred length character field of derived type looses
                    its value when used in subroutine call
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: baradi09 at gmail dot com

Created attachment 33477
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33477&action=edit
Fortran source file demonstrating the erroneous behavior

Take a deferred length allocatable character component in a derived type. Pass
this to a subroutine, which expects an allocatable deferred length character as
argument. Whatever value is given to it within the subroutine, its value is
lost (empty string) when the program leaves the subroutine. 

Attached example demonstrates that. While the first print statement within the
subroutine shows the correct string, the second one in the main program
indicates a character component which is allocated, but has the empty string as
content.