From 5f6c59565ba0711a7ae0dea0cbb02b349ff115c6 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Tue, 18 Sep 2012 18:15:22 +0400
Subject: [PATCH] some diagnostics for IDEA-91650 Threadlock

---
 .../intellij/ide/highlighter/custom/AbstractCustomLexer.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/platform/indexing-impl/src/com/intellij/ide/highlighter/custom/AbstractCustomLexer.java b/platform/indexing-impl/src/com/intellij/ide/highlighter/custom/AbstractCustomLexer.java
index 5ec0ecbe4d4d..f04851053b7b 100644
--- a/platform/indexing-impl/src/com/intellij/ide/highlighter/custom/AbstractCustomLexer.java
+++ b/platform/indexing-impl/src/com/intellij/ide/highlighter/custom/AbstractCustomLexer.java
@@ -77,6 +77,9 @@ public class AbstractCustomLexer extends LexerBase {
     for (TokenParser tokenParser : myTokenParsers) {
       if (tokenParser.hasToken(myPosition)) {
         tokenParser.getTokenInfo(myCurrentToken);
+        if (myCurrentToken.getEnd() <= myCurrentToken.getStart()) {
+          throw new AssertionError(tokenParser);
+        }
         tokenFound = true;
         break;
       }