[Bug fortran/92961] [8/9/10 Regression] ICE in gfc_zero_size_array, at fortran/arith.c:1680

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92961

G. Steinmetz <gscfq@t-online.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code

--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---

And when involving such an array, e.g.


$ cat z2.f90
subroutine s
   integer :: a(0/(0))
   integer :: b = ubound(a,1)
end


$ gfortran-10-20191215 -c z2.f90
f951: internal compiler error: Segmentation fault
0xb8147f crash_signal
        ../../gcc/toplev.c:328
0x62e560 gfc_numeric_ts(gfc_typespec*)
        ../../gcc/fortran/expr.c:891
0x6a24f0 resolve_operator
        ../../gcc/fortran/resolve.c:4022
0x69f967 gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.c:6992
0x5fa584 resolve_array_bound
        ../../gcc/fortran/array.c:377
0x5fb1b6 gfc_resolve_array_spec(gfc_array_spec*, int)
        ../../gcc/fortran/array.c:421
0x6b0856 simplify_bound_dim
        ../../gcc/fortran/simplify.c:4014
0x6b0c57 simplify_bound
        ../../gcc/fortran/simplify.c:4232
0x640357 do_simplify
        ../../gcc/fortran/intrinsic.c:4583
0x64aa78 gfc_intrinsic_func_interface(gfc_expr*, int)
        ../../gcc/fortran/intrinsic.c:4848
0x630097 gfc_check_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.c:2873
0x6305b7 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.c:3053
0x633790 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.c:3099
0x61f6e3 variable_decl
        ../../gcc/fortran/decl.c:2832
0x61f6e3 gfc_match_data_decl()
        ../../gcc/fortran/decl.c:6098
0x6815a3 match_word
        ../../gcc/fortran/parse.c:65
0x6815a3 decode_statement
        ../../gcc/fortran/parse.c:376
0x682fea next_free
        ../../gcc/fortran/parse.c:1279
0x682fea next_statement
        ../../gcc/fortran/parse.c:1511
0x68463b parse_spec
        ../../gcc/fortran/parse.c:3922