[Bug driver/71063] ICE: Segmentation fault with --help="^"

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71063

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
FWIW, my fix was

--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1641,6 +1641,11 @@ common_handle_option (struct gcc_options *opts,
          {
        ++ a;
        pflags = & exclude_flags;
+       if (*a == '\0')
+         {
+           error_at (loc, "missing argument to %qs", "--help=^");
+           break;
+         }
          }
        else
          pflags = & include_flags;