The test
jdk/jshell/TerminalNoExecTest.java
runs sometimes on Windows into this exception :

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.lang.CharSequence.length()" because "text" is null
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext.countTrailintBackslashes(ConsoleIOContext.java:304)
at jdk.jshell/jdk.internal.jshell.tool.ConsoleIOContext.<init>(ConsoleIOContext.java:203)
at jdk.jshell/jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:1014)
at jdk.jshell/jdk.internal.jshell.tool.JShellToolBuilder.run(JShellToolBuilder.java:259)
at TerminalNoExecTest.main(TerminalNoExecTest.java:61)

Seems we miss a null check somewhere in the coding. This happens 1-2 times a month in our test infrastructure.