From 6a413c23f5f2ed72577765f5cdc6743ca18e7180 Mon Sep 17 00:00:00 2001
From: "Egor.Ushakov" <egor.ushakov@jetbrains.com>
Date: Tue, 27 Oct 2015 14:49:30 +0300
Subject: [PATCH] EA-74148 - IAE: XDebuggerEditorsProvider.createExpression

---
 .../xdebugger/impl/ui/XDebuggerExpressionComboBox.java      | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/ui/XDebuggerExpressionComboBox.java b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/ui/XDebuggerExpressionComboBox.java
index b5b17c9b4b79..829796ef31ed 100644
--- a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/ui/XDebuggerExpressionComboBox.java
+++ b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/ui/XDebuggerExpressionComboBox.java
@@ -150,7 +150,11 @@ public class XDebuggerExpressionComboBox extends XDebuggerEditorBase {
         return (XExpression)value;
       }
     }
-    return getEditorsProvider().createExpression(getProject(), (Document)myEditor.getItem(), myExpression.getLanguage(), EvaluationMode.EXPRESSION);
+    Object document = myEditor.getItem();
+    if (document != null) { //sometimes happens on Mac
+      return getEditorsProvider().createExpression(getProject(), (Document)document, myExpression.getLanguage(), EvaluationMode.EXPRESSION);
+    }
+    return myExpression;
   }
 
   @Override