diff --git a/java/java-impl/src/com/intellij/codeInsight/CodeInsightUtil.java b/java/java-impl/src/com/intellij/codeInsight/CodeInsightUtil.java
index be0920c9ea97..d4fb28810d04 100644
--- a/java/java-impl/src/com/intellij/codeInsight/CodeInsightUtil.java
+++ b/java/java-impl/src/com/intellij/codeInsight/CodeInsightUtil.java
@@ -21,6 +21,7 @@ import com.intellij.codeInsight.completion.JavaCompletionUtil;
 import com.intellij.codeInsight.completion.PrefixMatcher;
 import com.intellij.lang.Language;
 import com.intellij.lang.StdLanguages;
+import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.fileEditor.OpenFileDescriptor;
@@ -46,6 +47,8 @@ import org.jetbrains.annotations.Nullable;
 import java.util.*;
 
 public class CodeInsightUtil {
+  private static final Logger LOG = Logger.getInstance(CodeInsightUtil.class);
+
   @Nullable
   public static PsiExpression findExpressionInRange(PsiFile file, int startOffset, int endOffset) {
     if (!file.getViewProvider().getLanguages().contains(StdLanguages.JAVA)) return null;
@@ -256,6 +259,7 @@ public class CodeInsightUtil {
   
   public static Editor positionCursor(final Project project, PsiFile targetFile, @NotNull PsiElement element) {
     TextRange range = element.getTextRange();
+    LOG.assertTrue(range != null, "element: " + element + "; valid: " + element.isValid());
     int textOffset = range.getStartOffset();
 
     OpenFileDescriptor descriptor = new OpenFileDescriptor(project, targetFile.getVirtualFile(), textOffset);