IDEA-173171 Typing , in an empty file causes IndexOutOfBoundsException

java/java-impl/src/com/intellij/codeInsight/editorActions/JavaTypedHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2016 JetBrains s.r.o.
+ * Copyright 2000-2017 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -223,6 +223,7 @@ public class JavaTypedHandler extends TypedHandlerDelegate {
   }
 
   private static boolean mightBeInsideDefaultAnnotationAttribute(@NotNull Editor editor, int offset) {
+    if (offset < 0) return false;
     HighlighterIterator iterator = ((EditorEx)editor).getHighlighter().createIterator(offset);
     int parenCount = 0;
     while (!iterator.atEnd()) {