test/testlibrary_tests/ctw/JarDirTest.java has failed every night since December 30 where it was updated by the fix for JDK-8172149.

 stdout: [# jar: jars\\bar.jar
[1] Foo
[2] Bar
# jar: jars\\foo.jar
[3] Foo
[4] Bar
Done (4 classes, 12 methods, 16095 ms)
];
 stderr: []
 exitValue = -1

java.lang.RuntimeException: '# jar_in_dir: jars' missing from stdout/stderr

at jdk.test.lib.process.OutputAnalyzer.shouldContain(OutputAnalyzer.java:134)
at CtwTest.check(CtwTest.java:87)
at CtwTest.run(CtwTest.java:70)
at JarDirTest.main(JarDirTest.java:62)
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:538)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.base/java.lang.Thread.run(Thread.java:844)