ADDITIONAL SYSTEM INFORMATION :
Microsoft Windows [Version 10.0.16299.371]

Darwin unit 17.5.0 Darwin Kernel Version 17.5.0: Fri Apr 13 19:32:32 PDT 2018; root:xnu-4570.51.2~1/RELEASE_X86_64 x86_64

JDK under test: C:\\Program Files\\Java\\jdk-10.0.1
java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)

A DESCRIPTION OF THE PROBLEM :
The test javax/swing/plaf/basic/BasicTreeUI/8023474/bug8023474.java fails on Windows and MacOSX with the message "java.lang.RuntimeException: Test Failed!"
The issue was not observed in Linux

Please note: it is a regression. On Windows the test intermittently failed on 8u172 in regular runs of jtreg-test, but the fauilure could not be reproduced from CL (see the issue JDK-8172887). With 10.0.1 it is easily reproduced.

REGRESSION : Last worked in version 8u172

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
$ jtreg -v -testjdk:/cygdrive/c/Program\ Files/Java/jdk-10.0.1 -javaoptions:"-Djava.awt.headless=false" -timeoutFactor:2 test/javax/swing/plaf/basic/BasicTreeUI/8023474/bug8023474.java

ACTUAL -
#section:main
----------messages:(5/187)----------
command: main bug8023474
reason: User specified action: run main bug8023474
Mode: othervm
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 1.108
----------configuration:(3/43)----------
Boot Layer
  add modules: java.desktop

----------System.out:(0/0)----------
----------System.err:(13/785)----------
java.lang.RuntimeException: Test Failed!
at bug8023474.main(bug8023474.java:67)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
at java.base/java.lang.Thread.run(Thread.java:844)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Test Failed!
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Test Failed!

---------- BEGIN SOURCE ----------
http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/777356696811/test/javax/swing/plaf/basic/BasicTreeUI/8023474/bug8023474.java
---------- END SOURCE ----------