JVM crash happened during JCK-runtime7 testing on Windows 2008 SP2 x86 platform with JDK 7 b123.

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (os_windows.cpp:4751), pid=12444, tid=9692
# Error: ShouldNotReachHere()
#
# JRE version: 7.0-b123
# Java VM: Java HotSpot(TM) Client VM (20.0-b04 mixed mode, sharing windows-x86 )
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

See full log in the attachments.

This is regression since JDK 7 b123. Reproducible on other Windows platfrom.
The issue is not reproducible on Solaris/Linus.