From 35699424a9e2d286fcbf3ac040f4e2a2b1027f0b Mon Sep 17 00:00:00 2001
From: Kouki Ooyatsu <kouki-o@iij.ad.jp>
Date: Wed, 31 Oct 2012 20:15:39 +0900
Subject: fix: broken variable reference, use 'next' statement

 Because the tree is gone pop() even if it is empty.
---
 src/codegen.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/codegen.c b/src/codegen.c
index ebc9b32de..ca2269d85 100644
--- a/src/codegen.c
+++ b/src/codegen.c
@@ -1556,8 +1556,10 @@ codegen(codegen_scope *s, node *tree, int val)
       genop(s, MKOP_sBx(OP_JMP, s->loop->pc1 - s->pc));
     }
     else {
-      codegen(s, tree, VAL);
-      pop();
+      if (tree) {
+        codegen(s, tree, VAL);
+        pop();
+      }
       genop_peep(s, MKOP_AB(OP_RETURN, cursp(), OP_R_NORMAL), NOVAL);
     }
     if (val) push();
-- 
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