An internal error occurred during: "Requesting JavaScript AST from selection".()

Eclipse Error - An internal error occurred during: "Requesting JavaScript AST from selection"解决方案用 Eclipse Helios或者Eclipse indigo 编写Javascript函数中出现 return 时。 错误提示： An internal error occurred during: "Requesting JavaScript AST from selection".

java.lang.NullPointerException.

解决方法： 修改 Mark Occurrences。快捷键：Alt+Shift+O。 (Window-->Preferences->Javascript-->Editor-->Mark Occurrences)