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[Bug fortran/86278] New: gfortran crashes with internal compiler error: segmentation fault


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86278

            Bug ID: 86278
           Summary: gfortran crashes with internal compiler error:
                    segmentation fault
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: oivulf at gmail dot com
  Target Milestone: ---

While compiling the lapw code "exciting": http://exciting-code.org/ gfortran
crashes with segmentation fault.
The first crashing point is:
fox_m_fsys_format.F90:1289:0:

     if (.not.checkFmt(fmt)) then

internal compiler error: Segmentation fault

If I move the definition of checkFmt before its first call compilation proceeds
without any issue up to another module, where the same operation is needed.
The code is gpl and available for download at the same site.
Thank you
Fulvio Ciriaco

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