commit a8eaf008e92759142982f7b40720b2b2674bd663
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 fdbc6414d49262a6e3dbf2ecd383c3e1b311f9dc
parent 925d58c20aba52ef3901db7402a2067266ed12ea

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


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162430 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaExprObjC.cpp

diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index 0aabf8b..7c19a13 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -3101,8 +3101,8 @@
       canExprType->isObjCObjectPointerType()) {
     if (const ObjCObjectPointerType *ObjT =
         canExprType->getAs<ObjCObjectPointerType>())
-      if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable())
-        return false;
+      if (const ObjCInterfaceDecl *ObjI = ObjT->getInterfaceDecl())
+        return !ObjI->isArcWeakrefUnavailable();
   }
   return true;
 }