The following test failed in the JDK26 CI:

jdk/jshell/StartOptionTest.java

Here's a snippet from the log file:

#section:testng
----------messages:(8/959)----------
command: testng --patch-module jdk.jshell=/System/Volumes/Data/mesos/work_dir/jib-master/install/jdk-26+9-887/src.full/open/test/langtools/jdk/jshell/StartOptionTest-module-patch StartOptionTest
reason: User specified action: run testng/othervm --patch-module jdk.jshell=${test.src}/StartOptionTest-module-patch StartOptionTest
started: Tue Jul 29 13:56:21 GMT 2025
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules jdk.compiler,jdk.jdeps,jdk.jshell --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED --add-exports jdk.jdeps/com.sun.tools.javap=ALL-UNNAMED --add-exports jdk.jshell/jdk.internal.jshell.tool=ALL-UNNAMED --add-exports jdk.jshell/jdk.internal.jshell.tool.resources=ALL-UNNAMED --add-opens jdk.jshell/jdk.internal.jshell.tool.resources=ALL-UNNAMED
Process id: 46127
finished: Tue Jul 29 13:56:56 GMT 2025
elapsed time (seconds): 35.637
----------configuration:(10/710)----------

<snip>

----------System.out:(105/5689)----------
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testClasspath(): success [50ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testCommandFile(): success [857ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testErroneousFile(): success [731ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testExitCode(): success [1083ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testFeedbackOptionConflict(): success [10ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testHelpExtra(): success [3ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testHypenFile(): success [1963ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testInput(): success [1107ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testNegFeedbackOption(): success [469ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test
test StartOptionTest.testPreviewEnabled(): failure [27342ms]
java.lang.AssertionError: expected [test
] but found []
at org.testng.Assert.fail(Assert.java:99)
at org.testng.Assert.failNotEquals(Assert.java:1037)
at org.testng.Assert.assertEqualsImpl(Assert.java:140)
at org.testng.Assert.assertEquals(Assert.java:122)
at org.testng.Assert.assertEquals(Assert.java:629)
at org.testng.Assert.assertEquals(Assert.java:639)
at StartOptionTest.lambda$testPreviewEnabled$3(StartOptionTest.java:444)
at StartOptionTest.check(StartOptionTest.java:117)
at StartOptionTest.startCheckUserOutput(StartOptionTest.java:166)
at StartOptionTest.testPreviewEnabled(StartOptionTest.java:444)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:599)
at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)
at org.testng.internal.MethodRunner.runInSequence(MethodRunner.java:46)
at org.testng.internal.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:822)
at org.testng.internal.TestInvoker.invokeTestMethods(TestInvoker.java:147)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:128)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1604)
at org.testng.TestRunner.privateRun(TestRunner.java:764)
at org.testng.TestRunner.run(TestRunner.java:585)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:384)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:378)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:337)
at org.testng.SuiteRunner.run(SuiteRunner.java:286)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:96)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1218)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)
at org.testng.TestNG.runSuites(TestNG.java:1069)
at org.testng.TestNG.run(TestNG.java:1037)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:107)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:63)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1474)
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testShowVersion(): success [497ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testStartup(): success [1ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testStartupFailedOption(): success [418ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testStartupUnknown(): success [1ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testUnknown(): success [0ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testUnknownLoadFile(): success [249ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testUnknownModule(): success [289ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testUsage(): success [0ms]
config StartOptionTest.tearDown(): success [0ms]
config StartOptionTest.setUp(): success [0ms]
test StartOptionTest.testVersion(): success [0ms]
config StartOptionTest.tearDown(): success [0ms]

===============================================
jdk/jshell/StartOptionTest.java
Total tests run: 19, Passes: 18, Failures: 1, Skips: 0
===============================================

----------System.err:(58/6847)----------

This is a Tier1 failure so I would normally start this issue as a P2,
but the failure did not reproduce in the next build-ID. I've added
the intermittent label and started this issue as a P3.