https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88649

            Bug ID: 88649
           Summary: runtime error: load of value 137971008, which is not a
                    valid value for type 'gfc_intrinsic_op'
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
            Blocks: 63426
  Target Milestone: ---

Using ubsan GCC compiler, one can see:

$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/dec_bitwise_ops_1.f90
-O0 -fdec
../../gcc/fortran/resolve.c:4150:23: runtime error: load of value 137971008,
which is not a valid value for type 'gfc_intrinsic_op'
    #0 0xb1362e in resolve_operator ../../gcc/fortran/resolve.c:4150
    #1 0xb2ffce in gfc_resolve_expr(gfc_expr*) ../../gcc/fortran/resolve.c:6825
    #2 0xb61cfa in gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11269
    #3 0xb9cb84 in resolve_codes ../../gcc/fortran/resolve.c:16715
    #4 0xb9cd8b in gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:16750
    #5 0xad072e in resolve_all_program_units ../../gcc/fortran/parse.c:6067
    #6 0xad1a20 in gfc_parse_file() ../../gcc/fortran/parse.c:6317
    #7 0xc3694a in gfc_be_parse_file ../../gcc/fortran/f95-lang.c:204
    #8 0x22fdf98 in compile_file ../../gcc/toplev.c:456
    #9 0x2305493 in do_compile ../../gcc/toplev.c:2176
    #10 0x2305ac1 in toplev::main(int, char**) ../../gcc/toplev.c:2311
    #11 0x466210c in main ../../gcc/main.c:39
    #12 0x7ffff608cfea in __libc_start_main ../csu/libc-start.c:308
    #13 0x872bd9 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/f951+0x872bd9)


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined

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