From 0ef6e3e11895b9fbb244b0dcf1a0d01526fa7c7d Mon Sep 17 00:00:00 2001
From: Anna Kozlova <anna.kozlova@jetbrains.com>
Date: Thu, 3 Sep 2015 12:10:21 +0300
Subject: [PATCH] EA-72540 - AIOOBE:
 ExtractMethodSignatureSuggester.detectTopLevelExpressionsToReplaceWithParameters

---
 .../extractMethod/ExtractMethodSignatureSuggester.java         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/java/java-impl/src/com/intellij/refactoring/extractMethod/ExtractMethodSignatureSuggester.java b/java/java-impl/src/com/intellij/refactoring/extractMethod/ExtractMethodSignatureSuggester.java
index 3ad037b7a5c7..305536f441b0 100644
--- a/java/java-impl/src/com/intellij/refactoring/extractMethod/ExtractMethodSignatureSuggester.java
+++ b/java/java-impl/src/com/intellij/refactoring/extractMethod/ExtractMethodSignatureSuggester.java
@@ -345,7 +345,8 @@ public class ExtractMethodSignatureSuggester {
         copies.add(myElementFactory.createExpressionFromText(expr.getText(), body));
 
         final SuggestedNameInfo info = JavaCodeStyleManager.getInstance(myProject).suggestVariableName(VariableKind.PARAMETER, null, expr, null);
-        name = uniqueNameGenerator.generateUniqueName(info.names[0]);
+        final String paramName = info.names.length > 0 ? info.names[0] : "p";
+        name = uniqueNameGenerator.generateUniqueName(paramName);
 
         final PsiParameter parameter = (PsiParameter)myExtractedMethod.getParameterList().add(myElementFactory.createParameter(name, type));
         inputVariables.add(parameter);