Return early if a parsing error has been found and do not perform any

sanity check as they might obviously fail.

Fix an assert found by jasper@ with AFL++ (port coming soon!).

ok jasper@

diff --git a/usr.sbin/btrace/bt_parse.y b/usr.sbin/btrace/bt_parse.y
index 9cda358..9639019 100644 (file)
--- a/usr.sbin/btrace/bt_parse.y
+++ b/usr.sbin/btrace/bt_parse.y
@@ -1,4 +1,4 @@
-/*     $OpenBSD: bt_parse.y,v 1.37 2021/08/31 12:51:24 mpi Exp $       */
+/*     $OpenBSD: bt_parse.y,v 1.38 2021/09/07 19:18:08 mpi Exp $       */
 
 /*
  * Copyright (c) 2019-2021 Martin Pieuchot <mpi@openbsd.org>
@@ -971,8 +971,10 @@ btparse(const char *str, size_t len, const char *filename, int debug)
        yylval.lineno = 1;
 
        yyparse();
+       if (perrors)
+               return perrors;
 
        assert(SLIST_EMPTY(&l_variables));
 
-       return perrors;
+       return 0;
 }