From 622ca84e2cee93f166180dfb5ba8c06dcf736a98 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yann=20C=C3=A9bron?= <yann.cebron@jetbrains.com>
Date: Fri, 9 Mar 2018 11:51:56 +0100
Subject: [PATCH] [java] JavaClassReferenceSet.canReferencePackage: avoid
 SIOOBE

---
 .../reference/impl/providers/JavaClassReferenceSet.java       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/java/java-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/providers/JavaClassReferenceSet.java b/java/java-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/providers/JavaClassReferenceSet.java
index d7ed07782483..818ab7101844 100644
--- a/java/java-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/providers/JavaClassReferenceSet.java
+++ b/java/java-impl/src/com/intellij/psi/impl/source/resolve/reference/impl/providers/JavaClassReferenceSet.java
@@ -18,6 +18,7 @@ package com.intellij.psi.impl.source.resolve.reference.impl.providers;
 import com.intellij.codeInsight.daemon.JavaErrorMessages;
 import com.intellij.lang.xml.XMLLanguage;
 import com.intellij.openapi.util.TextRange;
+import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiReference;
 import com.intellij.psi.util.PsiUtil;
@@ -246,7 +247,8 @@ public class JavaClassReferenceSet {
   public boolean canReferencePackage(int index) {
     if (index == myReferences.length - 1) return false;
     String text = getElement().getText();
-    return text.charAt(myReferences[index].getRangeInElement().getEndOffset()) != DOLLAR;
+    int endOffset = myReferences[index].getRangeInElement().getEndOffset();
+    return !StringUtil.isChar(text, endOffset, DOLLAR);
   }
 
   public boolean isSoft() {