diff --git a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupManagerImpl.java b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupManagerImpl.java
index 4c56449b6059..32e60d2581fb 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupManagerImpl.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupManagerImpl.java
@@ -126,6 +126,10 @@ public class LookupManagerImpl extends LookupManager {
                                  @NotNull final LookupArranger arranger) {
     hideActiveLookup();
 
+    if (myActiveLookup != null) {
+      LOG.error(myActiveLookup.isLookupDisposed());
+    }
+
     final CodeInsightSettings settings = CodeInsightSettings.getInstance();
 
     final PsiFile psiFile = PsiDocumentManager.getInstance(myProject).getPsiFile(editor.getDocument());