[Bug fortran/87922] New: ICE in gfc_wide_strlen, at fortran/scanner.c:142

["gscfq at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87922

            Bug ID: 87922
           Summary: ICE in gfc_wide_strlen, at fortran/scanner.c:142
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

With a non-scalar-default-char-constant-expr since at least gfortran-5 :


$ cat z1.f90
program p
   read (1, asynchronous=['no'])
   read (1, asynchronous=[character::])
end

$ cat z2.f90
program p
   write (1, asynchronous=['no'])
   write (1, asynchronous=[character::])
end


$ gfortran-9-20181104 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb205df crash_signal
        ../../gcc/toplev.c:325
0x694450 gfc_wide_strlen(unsigned int const*)
        ../../gcc/fortran/scanner.c:142
0x638587 compare_to_allowed_values
        ../../gcc/fortran/io.c:2008
0x63b7ca check_io_constraints
        ../../gcc/fortran/io.c:3797
0x63b7ca match_io
        ../../gcc/fortran/io.c:4301
0x66a3c1 match_word
        ../../gcc/fortran/parse.c:65
0x66e1a0 decode_statement
        ../../gcc/fortran/parse.c:549
0x66e72a next_free
        ../../gcc/fortran/parse.c:1234
0x66e72a next_statement
        ../../gcc/fortran/parse.c:1466
0x670a94 parse_spec
        ../../gcc/fortran/parse.c:3674
0x672807 parse_progunit
        ../../gcc/fortran/parse.c:5671
0x673e89 gfc_parse_file()
        ../../gcc/fortran/parse.c:6211
0x6bc03f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204