I got this failure on a test run:

[TestNG] Running:
  jdk/jshell/ErrorTranslationTest.java

test ErrorTranslationTest.testWarnings(): failure
java.lang.AssertionError: Expected start-up message '| Welcome to' Got: | Error:
| package java.anyutil does not exist
| Error:
| package java.anyutil.concurrent does not exist
| Welcome to JShell -- Version 1.9.0-internal
| Type /help for help
 expected [true] but found [false]
at org.testng.Assert.fail(Assert.java:94)
at org.testng.Assert.failNotEquals(Assert.java:494)
at org.testng.Assert.assertTrue(Assert.java:42)
at ReplToolTesting.lambda$null$4(ReplToolTesting.java:175)
at ReplToolTesting.assertCommandCheckOutput(ReplToolTesting.java:359)
at ReplToolTesting.lambda$test$5(ReplToolTesting.java:174)
at ReplToolTesting$PromptedCommandOutputStream.write(ReplToolTesting.java:633)
at ReplToolTesting$PromptedCommandOutputStream.write(ReplToolTesting.java:649)
at java.io.PrintStream.write(PrintStream.java:480)
at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:294)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:298)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
at jdk.internal.jline.console.ConsoleReader.readLine(ConsoleReader.java:2336)
at jdk.internal.jline.console.ConsoleReader.readLine(ConsoleReader.java:2277)
at jdk.internal.jshell.tool.ConsoleIOContext.readLine(ConsoleIOContext.java:153)
at jdk.internal.jshell.tool.JShellTool.run(JShellTool.java:447)
at jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:266)
at jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:245)
at ReplToolTesting.testRaw(ReplToolTesting.java:211)
at ReplToolTesting.test(ReplToolTesting.java:179)
at ReplToolTesting.test(ReplToolTesting.java:167)
at ReplToolTesting.test(ReplToolTesting.java:163)
at ReplToolTesting.test(ReplToolTesting.java:159)
at ErrorTranslationTest.testWarnings(ErrorTranslationTest.java:73)
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:520)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:163)
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:520)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:218)
at java.lang.Thread.run(Thread.java:747)

===============================================
jdk/jshell/ErrorTranslationTest.java
Total tests run: 1, Failures: 1, Skips: 0
===============================================





The failure seems to point at the fact that the test is picking up my persistent jshell configuration, which contains the following entry:

<entry key="STARTUP" value="&#10;import java.anyutil.*;&#10;import java.io.*;&#10;import java.math.*;&#10;import java.net.*;&#10;import java.anyutil.concurrent.*;&#10;import java.util.prefs.*;&#10;import java.util.regex.*;&#10;void printf(String format, Object... args) { System.out.printf(format, args); }&#10;"/>