From 9600a7072488725697c030f1446c6e0784f3329c Mon Sep 17 00:00:00 2001
From: Sam Harwell <sam@tunnelvisionlabs.com>
Date: Mon, 13 Feb 2012 08:41:57 -0600
Subject: [PATCH] Fix NPE in CommonToken when TokenSource is not available

---
 runtime/Java/src/org/antlr/v4/runtime/CommonToken.java | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/runtime/Java/src/org/antlr/v4/runtime/CommonToken.java b/runtime/Java/src/org/antlr/v4/runtime/CommonToken.java
index 18564fbeb..7e591dcf5 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/CommonToken.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/CommonToken.java
@@ -64,8 +64,10 @@ public class CommonToken implements WritableToken, Serializable {
 		this.channel = channel;
 		this.start = start;
 		this.stop = stop;
-        this.line = source.getLine();
-        this.charPositionInLine = source.getCharPositionInLine();
+		if (source != null) {
+			this.line = source.getLine();
+			this.charPositionInLine = source.getCharPositionInLine();
+		}
 	}
 
 	public CommonToken(int type, String text) {
@@ -190,7 +192,7 @@ public class CommonToken implements WritableToken, Serializable {
 	}
 
 	public CharStream getInputStream() {
-		return source.getInputStream();
+		return source != null ? source.getInputStream() : null;
 	}
 
 	public String toString() {