From 8c2ddab57a74377c108c3a5a58d2580f063d114b Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 25 May 2016 04:21:31 +0000
Subject: * regcomp.c (compile_length_tree): return error code immediately   if
 compile_length_tree raised error [Bug #12418]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55154 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 regcomp.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to 'regcomp.c')

diff --git a/regcomp.c b/regcomp.c
index 23cb0ead9a..34b37f8e4c 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -1592,13 +1592,15 @@ compile_length_tree(Node* node, regex_t* reg)
 
   case NT_ALT:
     {
-      int n;
-
-      n = r = 0;
+      int n = 0;
+      len = 0;
       do {
-	r += compile_length_tree(NCAR(node), reg);
-	n++;
+        r = compile_length_tree(NCAR(node), reg);
+        if (r < 0) return r;
+        len += r;
+        n++;
       } while (IS_NOT_NULL(node = NCDR(node)));
+      r = len;
       r += (SIZE_OP_PUSH + SIZE_OP_JUMP) * (n - 1);
     }
     break;
-- 
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