From e559e04a60e4d937af1875396c06d07e86650408 Mon Sep 17 00:00:00 2001
From: peter <peter@jetbrains.com>
Date: Fri, 22 Apr 2016 06:55:47 +0200
Subject: [PATCH] assert that completion file copy should be non-physical and
 non-event-system-enabled

---
 .../codeInsight/completion/CodeCompletionHandlerBase.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/platform/lang-impl/src/com/intellij/codeInsight/completion/CodeCompletionHandlerBase.java b/platform/lang-impl/src/com/intellij/codeInsight/completion/CodeCompletionHandlerBase.java
index 3b484adc4e4c..7a5285067dc1 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/completion/CodeCompletionHandlerBase.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/completion/CodeCompletionHandlerBase.java
@@ -752,6 +752,10 @@ public class CodeCompletionHandlerBase {
     }
 
     final PsiFile copy = (PsiFile)file.copy();
+    if (copy.isPhysical() || copy.getViewProvider().isEventSystemEnabled()) {
+      LOG.error("File copy should be non-physical and non-event-system-enabled! Language=" + file.getLanguage() + "; file=" + file + " of " + file.getClass());
+    }
+
     if (mayCacheCopy) {
       final Document document = copy.getViewProvider().getDocument();
       assert document != null;