Index: cfe/trunk/include/clang/AST/RecursiveASTVisitor.h
===================================================================
--- cfe/trunk/include/clang/AST/RecursiveASTVisitor.h
+++ cfe/trunk/include/clang/AST/RecursiveASTVisitor.h
@@ -1368,9 +1368,14 @@
 template <typename Derived>
 bool RecursiveASTVisitor<Derived>::canIgnoreChildDeclWhileTraversingDeclContext(
     const Decl *Child) {
-  // BlockDecls and CapturedDecls are traversed through BlockExprs and
-  // CapturedStmts respectively.
-  return isa<BlockDecl>(Child) || isa<CapturedDecl>(Child);
+  // BlockDecls are traversed through BlockExprs,
+  // CapturedDecls are traversed through CapturedStmts.
+  if (isa<BlockDecl>(Child) || isa<CapturedDecl>(Child))
+    return true;
+  // Lambda classes are traversed through LambdaExprs.
+  if (const CXXRecordDecl* Cls = dyn_cast<CXXRecordDecl>(Child))
+    return Cls->isLambda();
+  return false;
 }
 
 template <typename Derived>
Index: cfe/trunk/unittests/Tooling/RecursiveASTVisitorTests/LambdaExpr.cpp
===================================================================
--- cfe/trunk/unittests/Tooling/RecursiveASTVisitorTests/LambdaExpr.cpp
+++ cfe/trunk/unittests/Tooling/RecursiveASTVisitorTests/LambdaExpr.cpp
@@ -65,6 +65,17 @@
   EXPECT_FALSE(Visitor.allClassesHaveBeenTraversed());
 }
 
+TEST(RecursiveASTVisitor, TopLevelLambda) {
+  LambdaExprVisitor Visitor;
+  Visitor.VisitImplicitCode = true;
+  Visitor.ExpectMatch("", 1, 10);
+  Visitor.ExpectMatch("", 1, 14);
+  EXPECT_TRUE(Visitor.runOver("auto x = []{ [] {}; };",
+                              LambdaExprVisitor::Lang_CXX11));
+  EXPECT_TRUE(Visitor.allBodiesHaveBeenTraversed());
+  EXPECT_TRUE(Visitor.allClassesHaveBeenTraversed());
+}
+
 TEST(RecursiveASTVisitor, VisitsLambdaExprAndImplicitClass) {
   LambdaExprVisitor Visitor;
   Visitor.VisitImplicitCode = true;