[libclang] Fix crash on invalid code. Fixes rdar://10451854

llvm-svn: 144766

clang/lib/Frontend/ASTUnit.cpp

@@ -853,6 +853,9 @@ public:
   }
 
   void handleTopLevelDecl(Decl *D) {
+    if (!D)
+      return;
+
     // FIXME: Currently ObjC method declarations are incorrectly being
     // reported as top-level declarations, even though their DeclContext
     // is the containing ObjC @interface/@implementation.  This is a

clang/lib/Parse/ParseObjc.cpp

@@ -1487,7 +1487,8 @@ Parser::ParseObjCAtEndDeclaration(SourceRange atEnd) {
   Actions.DefaultSynthesizeProperties(getCurScope(), ObjCImpDecl);
   for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i) {
     Decl *D = ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i]);
-    DeclsInGroup.push_back(D);
+    if (D)
+      DeclsInGroup.push_back(D);
   }
   DeclsInGroup.push_back(ObjCImpDecl);
   

clang/test/Index/invalid-code-rdar10451854.m

@@ -0,0 +1,15 @@
+struct {
+
+@implementation Foo
+
+- (void)finalize {
+  NSLog(@"bar");
+}
+
+- (NSArray *)graphics {
+}
+
+@end
+
+// Test that we don't crash
+// RUN: c-index-test -test-load-source-reparse 3 local %s