From d3d939ab7fc14f73d1bb20a6e84a4428e6cde24a Mon Sep 17 00:00:00 2001
From: Joshua Haberman <joshua@reverberate.org>
Date: Wed, 21 Jul 2010 21:54:36 -0700
Subject: Fix the case where no def is found for lookup.

---
 lang_ext/lua/upb.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lang_ext')

diff --git a/lang_ext/lua/upb.c b/lang_ext/lua/upb.c
index a16a187..a8165c7 100644
--- a/lang_ext/lua/upb.c
+++ b/lang_ext/lua/upb.c
@@ -187,7 +187,11 @@ static int lupb_symtab_lookup(lua_State *L) {
   const char *name = luaL_checklstring(L, 2, &len);
   upb_string namestr = UPB_STACK_STRING_LEN(name, len);
   upb_def *def = upb_symtab_lookup(s->symtab, &namestr);
-  lupb_def_getorcreate(L, def);
+  if (def) {
+    lupb_def_getorcreate(L, def);
+  } else {
+    lua_pushnil(L);
+  }
   return 1;
 }
 
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