commit 802c4b7015d4b7236b822d3ebda8b428a1be20ad
author Richard Smith <richard-llvm@metafoo.co.uk> Thu Aug 23 06:16:52 2012 +0000
committer Richard Smith <richard-llvm@metafoo.co.uk> Thu Aug 23 06:16:52 2012 +0000
tree 18fef6975b5f037982060652ca12d8b75d463d8c
parent 7bdc8ae20b5baaf33429f48b651ea97d569c70cd

Fix undefined behavior: member function calls where 'this' is a null pointer.

llvm-svn: 162430

clang/lib/ARCMigrate/Transforms.cpp

diff --git a/clang/lib/ARCMigrate/Transforms.cpp b/clang/lib/ARCMigrate/Transforms.cpp
index f01dfa9..805a67d 100644
--- a/clang/lib/ARCMigrate/Transforms.cpp
+++ b/clang/lib/ARCMigrate/Transforms.cpp
@@ -59,7 +59,7 @@
       return false; // id/NSObject is not safe for weak.
     if (!AllowOnUnknownClass && !Class->hasDefinition())
       return false; // forward classes are not verifiable, therefore not safe.
-    if (Class->isArcWeakrefUnavailable())
+    if (Class && Class->isArcWeakrefUnavailable())
       return false;
   }