Errors occur during the file Rename if the file is opened in the Editor

EXECUTE:
1. Create new JSF project
2. Open any faces-config.xml file in the Editor
3. On Web Projects view right click on this faces-config.xml and select rename from context menu. Enter another name in rename dialog. Press Ok.

FAILURE: Exceptions thrown (please find Exception Stack Trace in the attachment)

(The same errors occur during the renaming of struts-config.xml, TLD file)