* src/reader.c (read_declarations): Don't abort on tok_illegal,

issue an error message.
* tests/regression.at (Invalid %directive): New.
Reported by Hans Aberg.

src/reader.c

@@ -1018,10 +1018,10 @@ read_declarations (void)
 	    case tok_stropt:
 	    case tok_intopt:
 	    case tok_obsolete:
-	    case tok_illegal:
 	      abort ();
 	      break;
 
+	    case tok_illegal:
 	    default:
 	      complain (_("unrecognized: %s"), token_buffer);
 	      skip_to_char ('%');