Buggy For loop in Java VM 6 x64

I have faced extremely weird bug in Java VM x64 yesterday. For loop in the following snippet will end at n == 15588, which obviously not greater that Integer.MAX_VALUE. Looks like it is bug of x64 version only. At least on x32 of same version everything works fine.


Tested on:
java version "1.6.0_27"
Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode)
and
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
Everything looks fine with While loop.
Have reported a bug on http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7100905.