From 0e5bcc2416818a17e5e46f34b9df2a207cc3fd2b Mon Sep 17 00:00:00 2001
From: Sam Harwell <sam@tunnelvisionlabs.com>
Date: Fri, 17 May 2013 23:56:56 -0500
Subject: [PATCH] Report file names with lexer errors

---
 tool/test/org/antlr/v4/test/TestPerformance.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tool/test/org/antlr/v4/test/TestPerformance.java b/tool/test/org/antlr/v4/test/TestPerformance.java
index d30c6ebb1..f7e7227bf 100644
--- a/tool/test/org/antlr/v4/test/TestPerformance.java
+++ b/tool/test/org/antlr/v4/test/TestPerformance.java
@@ -1094,6 +1094,9 @@ public class TestPerformance extends BaseTest {
 							sharedLexers[thread] = lexer;
                         }
 
+						lexer.removeErrorListeners();
+						lexer.addErrorListener(DescriptiveErrorListener.INSTANCE);
+
 						if (lexer.getInterpreter().decisionToDFA[0] == null) {
 							ATN atn = lexer.getATN();
 							for (int i = 0; i < lexer.getInterpreter().decisionToDFA.length; i++) {