From 73e4f069becaf69707b990d658b34155f8973508 Mon Sep 17 00:00:00 2001
From: Bouke van der Bijl <boukevanderbijl@gmail.com>
Date: Fri, 18 Nov 2016 16:17:40 -0500
Subject: Fix nested empty heredoc causing segfault

As reported by https://hackerone.com/jpenalbae
---
 mrbgems/mruby-compiler/core/codegen.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'mrbgems/mruby-compiler/core/codegen.c')

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index 0c84dd558..13091a6f5 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -2285,7 +2285,11 @@ codegen(codegen_scope *s, node *tree, int val)
     if (val) {
       node *n = tree;
 
-      if (!n) break;
+      if (!n) {
+        genop(s, MKOP_A(OP_LOADNIL, cursp()));
+        push();
+        break;
+      }
       codegen(s, n->car, VAL);
       n = n->cdr;
       while (n) {
-- 
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