From 18a11e33ea4f19d17f84e2d9f375ef08c25ca85b Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Wed, 11 Apr 2012 21:48:13 +0000
Subject: [PATCH] Fixed a crash in Clang when a superclass of an Objective-C
 class doesn't have a definition but Clang tries to read through its protocols
 anyway.

llvm-svn: 154538
---
 .../clang.check-definition-for-superclasses.diff  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 lldb/scripts/clang.check-definition-for-superclasses.diff

diff --git a/lldb/scripts/clang.check-definition-for-superclasses.diff b/lldb/scripts/clang.check-definition-for-superclasses.diff
new file mode 100644
index 000000000000..566c518c1971
--- /dev/null
+++ b/lldb/scripts/clang.check-definition-for-superclasses.diff
@@ -0,0 +1,15 @@
+Index: lib/AST/DeclObjC.cpp
+===================================================================
+--- lib/AST/DeclObjC.cpp	(revision 152265)
++++ lib/AST/DeclObjC.cpp	(working copy)
+@@ -330,6 +330,10 @@
+     LoadExternalDefinition();
+ 
+   while (ClassDecl != NULL) {
++    // FIXME: Should make sure no callers ever do this.
++    if (!ClassDecl->hasDefinition())
++      return 0;
++        
+     if ((MethodDecl = ClassDecl->getMethod(Sel, isInstance)))
+       return MethodDecl;
+ 
-- 
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