Fix parser in case of unmatched angle bracket.

tests/compiler/dart2js/parser_test.dart

Index: tests/compiler/dart2js/parser_test.dart
diff --git a/tests/compiler/dart2js/parser_test.dart b/tests/compiler/dart2js/parser_test.dart
index d70fcb44ee661588a32dd6292c2e2455fc8a93ae..5cc7f558cfa9aca7de4b0e64664b77839986fb28 100644
--- a/tests/compiler/dart2js/parser_test.dart
+++ b/tests/compiler/dart2js/parser_test.dart
@@ -306,6 +306,18 @@ void testMissingCloseBraceInClass() {
   Expect.throws(parse, check);
 }
 
+void testUnmatchedAngleBracket() {
+  final String source = 'A<'; // unmatched '<'
+  parse() {
+    fullParseUnit(source, diagnosticHandler: new Collector());
+  }
+  check(Collector c) {
+    Expect.equals(LT_TOKEN, c.token);
+    return true;
+  }
+  Expect.throws(parse, check);
+}
+
 void main() {
   testGenericTypes();
   // TODO(ahe): Enable this test when we handle library prefixes.
@@ -322,4 +334,5 @@ void main() {
   testOperatorParse();
   testMissingCloseParen();
   testMissingCloseBraceInClass();
+  testUnmatchedAngleBracket();
 }