From 1a7a587a9ea11371c3748a632ac7613d20d1e5d2 Mon Sep 17 00:00:00 2001
From: Mike Morearty <mmorearty@users.noreply.github.com>
Date: Wed, 1 Nov 2017 16:37:06 -0700
Subject: [PATCH] Fix TokenOrIdentifierObject.getText() crash (#19673)

TokenOrIdentifierObject.getText() needs to pass `sourceFile` as an
argument to `getStart()`.

Fixes https://github.com/Microsoft/TypeScript/issues/19670
---
 src/services/services.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 06edd621e9..cd6fe86771 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -276,7 +276,10 @@ namespace ts {
         }
 
         public getText(sourceFile?: SourceFile): string {
-            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
+            if (!sourceFile) {
+                sourceFile = this.getSourceFile();
+            }
+            return sourceFile.text.substring(this.getStart(sourceFile), this.getEnd());
         }
 
         public getChildCount(): number {