[Bug fortran/102532] New: [10/11/12 Regression] ICE in gfc_get_corank, at fortran/expr.c:5769

[gscfq--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102532

            Bug ID: 102532
           Summary: [10/11/12 Regression] ICE in gfc_get_corank, at
                    fortran/expr.c:5769
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

Started with r6 (and detected somehow with r5) :


$ cat z1.f90
program p
   character(:), allocatable :: x[:]
   associate (y => x(:)(2:))
   end associate
end


$ cat z2.f90
program p
   character(:), allocatable :: x[:]
   associate (y => x(:)(:))
   end associate
end


$ gfortran-5 -c z1.f90 -fcoarray=lib 
z1.f90:3:20:

    associate (y => x(:)(2:))
                    1
Error: Rank mismatch in array reference at (1) (1/0)
z1.f90:3:27:

    associate (y => x(:)(2:))
                           1
Error: Entity 'y' at (1) has a deferred type parameter and requires either the
POINTER or ALLOCATABLE attribute


$ gfortran-12-20210926 -c z1.f90 -fcoarray=lib
f951: internal compiler error: in gfc_get_corank, at fortran/expr.c:5769
0x79c591 gfc_get_corank(gfc_expr*)
        ../../gcc/fortran/expr.c:5769
0x7f38fb parse_associate
        ../../gcc/fortran/parse.c:4981
0x7f38fb parse_executable
        ../../gcc/fortran/parse.c:5728
0x7f47ef parse_progunit
        ../../gcc/fortran/parse.c:6143
0x7f5ed1 gfc_parse_file()
        ../../gcc/fortran/parse.c:6658
0x842daf gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:216