From 3be2affff51305462af7c0bc7b251bbc45bb8165 Mon Sep 17 00:00:00 2001
From: Roman Shevchenko <roman.shevchenko@jetbrains.com>
Date: Fri, 16 Jul 2010 13:45:25 +0400
Subject: [PATCH] Do not advance PSI builder beyond end of token stream

---
 .../lang-impl/src/com/intellij/lang/impl/PsiBuilderImpl.java    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/platform/lang-impl/src/com/intellij/lang/impl/PsiBuilderImpl.java b/platform/lang-impl/src/com/intellij/lang/impl/PsiBuilderImpl.java
index bdd6b274da49..64bcae71ece0 100644
--- a/platform/lang-impl/src/com/intellij/lang/impl/PsiBuilderImpl.java
+++ b/platform/lang-impl/src/com/intellij/lang/impl/PsiBuilderImpl.java
@@ -476,6 +476,8 @@ public class PsiBuilderImpl extends UserDataHolderBase implements PsiBuilder {
   }
 
   public void advanceLexer() {
+    if (eof()) return;
+
     if (!myTokenTypeChecked) {
       LOG.assertTrue(eof(), "Probably a bug: eating token without its type checking");
     }