FULL PRODUCT VERSION :
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) Client VM (build 25.51-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
The test java/awt/Mixing/OpaqueTest.java fails on Windows with the message "java.lang.RuntimeException: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'"
This issue was not observed on Linux, OSX


ERROR MESSAGES/STACK TRACES THAT OCCUR :
#section:main
----------messages:(4/121)----------
command: main OpaqueTest
reason: User specified action: run main OpaqueTest
Mode: othervm
elapsed time (seconds): 2.114
----------configuration:(0/0)----------
----------System.out:(6/420)----------
Any messages for the tester will display here.
Any messages for the tester will display here.
The test failed: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'
The test failed: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'
The test is over, hit Ctl-C to stop Java VM
The test is over, hit Ctl-C to stop Java VM
----------System.err:(16/1101)----------
Fontconfig warning: ignoring UTF-8: not a valid region tag
java.lang.RuntimeException: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'
at OpaqueTest.fail(OpaqueTest.java:255)
at OpaqueTest.init(OpaqueTest.java:146)
at OpaqueTest.main(OpaqueTest.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.lang.Thread.run(Thread.java:745)

JavaTest Message: Test threw exception: java.lang.RuntimeException: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: The components changed their visible Z-order in a wrong sequence: '010000000' instead of '010000101'


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
The test is from Regression test suite (jtreg)
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/f7be58eb30bc/test/java/awt/Mixing/OpaqueTest.java
---------- END SOURCE ----------