[Bug fortran/83829] New: Implement runtime checks for DT format specifier and allignment with effective items

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83829

            Bug ID: 83829
           Summary: Implement runtime checks for DT format specifier and
                    allignment with effective items
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jvdelisle at gcc dot gnu.org
  Target Milestone: ---

As discussed on the gfortran mailing list, we need to hadle the case where a
User Defined Derived Type Procedure is provided for formatted I/O but the user
chooses not to use it by omitting the 'DT' specifier in a format string.

See thread here:

https://gcc.gnu.org/ml/fortran/2018-01/msg00032.html.

The patch for pr82007 eliminates the rejecting of valid code.