From 8e2b204ace1901aaced26cde1bb2084d8db11b6d Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Tue, 23 Jun 2015 11:25:33 -0700
Subject: [PATCH] do not try to classify missing nodes

---
 src/services/services.ts                           |  4 ++++
 .../fourslash/syntacticClassificationWithErrors.ts | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 tests/cases/fourslash/syntacticClassificationWithErrors.ts

diff --git a/src/services/services.ts b/src/services/services.ts
index 70022cfe0bf..18510b9a178 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -6300,6 +6300,10 @@ namespace ts {
             }
 
             function classifyToken(token: Node): void {
+                if (nodeIsMissing(token)) {
+                    return;
+                }
+
                 let tokenStart = classifyLeadingTriviaAndGetTokenStart(token);
 
                 let tokenWidth = token.end - tokenStart;
diff --git a/tests/cases/fourslash/syntacticClassificationWithErrors.ts b/tests/cases/fourslash/syntacticClassificationWithErrors.ts
new file mode 100644
index 00000000000..b4572d3e620
--- /dev/null
+++ b/tests/cases/fourslash/syntacticClassificationWithErrors.ts
@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts'/>
+
+////class A {
+////    a:
+////}
+////c =
+
+let c = classification
+verify.syntacticClassificationsAre(
+    c.keyword("class"), c.className("A"), c.punctuation("{"),
+    c.text("a"), c.punctuation(":"),
+    c.punctuation("}"),
+    c.text("c"), c.operator("=")
+    );
\ No newline at end of file