Index: cfe/trunk/lib/StaticAnalyzer/Core/CallEvent.cpp
===================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/CallEvent.cpp
+++ cfe/trunk/lib/StaticAnalyzer/Core/CallEvent.cpp
@@ -211,7 +211,9 @@
 }
 
 bool CallEvent::isCalled(const CallDescription &CD) const {
-  assert(getKind() != CE_ObjCMessage && "Obj-C methods are not supported");
+  // FIXME: Add ObjC Message support.
+  if (getKind() == CE_ObjCMessage)
+    return false;
   if (!CD.IsLookupDone) {
     CD.IsLookupDone = true;
     CD.II = &getState()->getStateManager().getContext().Idents.get(CD.FuncName);
Index: cfe/trunk/test/Analysis/block-in-critical-section.m
===================================================================
--- cfe/trunk/test/Analysis/block-in-critical-section.m
+++ cfe/trunk/test/Analysis/block-in-critical-section.m
@@ -0,0 +1,9 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.unix.BlockInCriticalSection -verify -Wno-objc-root-class %s
+
+@interface SomeClass
+-(void)someMethod;
+@end
+
+void shouldNotCrash(SomeClass *o) {
+  [o someMethod];
+}