Replace by string hint produces invalid code

Steps to reproduce:

1) apply hint on following code:
        int x = 3;        
        StringBuffer s = new StringBuffer(x);
        String y = s.toString();

-> int x = 3;        
   String s = new StringBuffer(x); // <- error
   String y = s;

BTW the hint is in category "perf", it should probably be "Performance"

Product Version: NetBeans IDE Dev (Build 20131202-95d36d354e99)
Java: 1.8.0-ea; Java HotSpot(TM) 64-Bit Server VM 25.0-b49
Runtime: Java(TM) SE Runtime Environment 1.8.0-ea-b107
System: Windows 7 version 6.1 running on amd64; Cp1250; en_US (nb)
User directory: C:\Users\jprox\AppData\Roaming\NetBeans\dev
Cache directory: C:\Users\jprox\AppData\Local\NetBeans\Cache\dev