From 2699b547ffcc98e382983f63939f6164c424cfce Mon Sep 17 00:00:00 2001
From: "Jay Freeman (saurik)" <saurik@saurik.com>
Date: Tue, 20 Oct 2009 04:57:15 +0000
Subject: [PATCH] Fixed an occasional crash bug in sig::Type copying.

---
 Library.mm | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Library.mm b/Library.mm
index a7da81e..e4bf70b 100644
--- a/Library.mm
+++ b/Library.mm
@@ -469,9 +469,14 @@ void Copy(apr_pool_t *pool, Type &lhs, Type &rhs) {
     if (sig::IsAggregate(rhs.primitive))
         Copy(pool, lhs.data.signature, rhs.data.signature);
     else {
-        if (rhs.data.data.type != NULL) {
-            lhs.data.data.type = new(pool) Type;
-            Copy(pool, *lhs.data.data.type, *rhs.data.data.type);
+        sig::Type *&lht(lhs.data.data.type);
+        sig::Type *&rht(rhs.data.data.type);
+
+        if (rht == NULL)
+            lht = NULL;
+        else {
+            lht = new(pool) Type;
+            Copy(pool, *lht, *rht);
         }
 
         lhs.data.data.size = rhs.data.data.size;
-- 
2.47.2