Fix external exceptions in external try-catch handlers.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index aa85e2a899e35f6bd0d2e201816f48d1af7956db..1dbc399479ed02dc2a7183a88b5bec1d32b97729 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -3720,6 +3720,30 @@ THREADED_TEST(TryCatchAndFinally) {
 }
 
 
+static void TryCatchNestedHelper(int depth) {
+  if (depth > 0) {
+    v8::TryCatch try_catch;
+    try_catch.SetVerbose(true);
+    TryCatchNestedHelper(depth - 1);
+    CHECK(try_catch.HasCaught());
+    try_catch.ReThrow();
+  } else {
+    v8::ThrowException(v8_str("back"));
+  }
+}
+
+
+TEST(TryCatchNested) {
+  v8::V8::Initialize();
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::TryCatch try_catch;
+  TryCatchNestedHelper(5);
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(0, strcmp(*v8::String::Utf8Value(try_catch.Exception()), "back"));
+}
+
+
 THREADED_TEST(Equality) {
   v8::HandleScope scope;
   LocalContext context;