使用单元测试的时候，提示如下错误。
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (javaClasses.cpp:129), pid=7080, tid=4296
# fatal error: Invalid layout of preloaded class
#
# JRE version: 7.0_21-b11
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.21-b01 mixed mode windows-amd64 compressed oops)
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#
--------------- T H R E A D ---------------
Current thread (0x000000000013c800): JavaThread "Unknown thread" [_thread_in_vm, id=4296, stack(0x00000000028b0000,0x00000000029b0000)]
Stack: [0x00000000028b0000,0x00000000029b0000]
[error occurred during error reporting (printing stack bounds), id 0xc0000005]
[解决办法]
Unknown thread?
