The test fails with the following output:

[TestNG] Running:
  jdk/nio/zipfs/MultiReleaseJarTest.java

config MultiReleaseJarTest.initialize(): success
test MultiReleaseJarTest.testIntegers(-5, 8): success
test MultiReleaseJarTest.testIntegers(0, 8): success
test MultiReleaseJarTest.testIntegers(8, 8): success
test MultiReleaseJarTest.testIntegers(9, 9): success
test MultiReleaseJarTest.testIntegers(10, 10): success
test MultiReleaseJarTest.testIntegers(11, 10): success
test MultiReleaseJarTest.testIntegers(100, 10): success
test MultiReleaseJarTest.testIsMultiReleaseJar(): failure
java.lang.AssertionError: expected [true] but found [false]
at org.testng.Assert.fail(Assert.java:94)
at org.testng.Assert.failNotEquals(Assert.java:496)
at org.testng.Assert.assertTrue(Assert.java:42)
at org.testng.Assert.assertTrue(Assert.java:52)
at MultiReleaseJarTest.testCustomMultiReleaseValue(MultiReleaseJarTest.java:221)
at MultiReleaseJarTest.testIsMultiReleaseJar(MultiReleaseJarTest.java:196)
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:547)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:821)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1131)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:773)
at org.testng.TestRunner.run(TestRunner.java:623)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
at org.testng.TestNG.run(TestNG.java:1018)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:89)
at jdk.internal.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:547)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:230)
at java.base/java.lang.Thread.run(Thread.java:844)
test MultiReleaseJarTest.testNewFileSystem(): success
test MultiReleaseJarTest.testShortJar(): success
test MultiReleaseJarTest.testStrings("runtime", 9): success
test MultiReleaseJarTest.testStrings("-20", 8): success
test MultiReleaseJarTest.testStrings("0", 8): success
test MultiReleaseJarTest.testStrings("8", 8): success
test MultiReleaseJarTest.testStrings("9", 9): success
test MultiReleaseJarTest.testStrings("10", 10): success
test MultiReleaseJarTest.testStrings("11", 10): success
test MultiReleaseJarTest.testStrings("50", 10): success
test MultiReleaseJarTest.testVersions(8, 8): success
test MultiReleaseJarTest.testVersions(9, 9): success
test MultiReleaseJarTest.testVersions(10, 10): success
test MultiReleaseJarTest.testVersions(11, 10): success
test MultiReleaseJarTest.testVersions(100, 10): success

The test was updated in JDK-8176709 with a couple of new test cases, and testCustomMultiReleaseValue("true\rOther: value", true) fails.