From 20b2c1c1d8097931aba33693708d695fc390d410 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Tue, 10 Sep 2013 11:34:02 +0200
Subject: [PATCH] Avoid undefined behavior after "not a context mod" error in
 context defs

---
 lily/parser.yy | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lily/parser.yy b/lily/parser.yy
index 9752da58ed..11d8d17125 100644
--- a/lily/parser.yy
+++ b/lily/parser.yy
@@ -650,6 +650,7 @@ context_mod_embedded:
 			$$ = $1;
 		else {
 			parser->parser_error (@1, _ ("not a context mod"));
+			$$ = Context_mod ().smobbed_copy ();
 		}
 	}
 	;
-- 
2.39.2