When JShell console is opened, there is written NPE stack trace (before the system informations). The JShell seems to works fine.


Unexpected exception reading start-up: java.lang.NullPointerException
java.lang.NullPointerException
	at java.util.regex.Matcher.getTextLength(Matcher.java:1283)
	at java.util.regex.Matcher.reset(Matcher.java:309)
	at java.util.regex.Matcher.<init>(Matcher.java:229)
	at java.util.regex.Pattern.matcher(Pattern.java:1093)
	at java.util.regex.Pattern.split(Pattern.java:1206)
	at java.util.regex.Pattern.split(Pattern.java:1273)
	at jdk.jshell.Util.expunge(Util.java:79)
	at jdk.jshell.Unit.computeQualifiedParameterTypes(Unit.java:446)
	at jdk.jshell.Unit.checkForOverwrite(Unit.java:400)
	at jdk.jshell.Unit.setStatus(Unit.java:258)
	at jdk.jshell.Eval.lambda$compileAndLoad$44(Eval.java:652)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
	at jdk.jshell.Eval.compileAndLoad(Eval.java:652)
	at jdk.jshell.Eval.declare(Eval.java:538)
	at jdk.jshell.Eval.eval(Eval.java:118)
	at jdk.jshell.JShell.eval(JShell.java:441)
	at org.netbeans.modules.jshell.tool.JShellTool.processCompleteSource(JShellTool.java:2446)
	at org.netbeans.modules.jshell.tool.JShellTool.processSource(JShellTool.java:2434)
	at org.netbeans.modules.jshell.tool.JShellTool.processSourceCatchingReset(JShellTool.java:935)
	at org.netbeans.modules.jshell.tool.JShellTool.process(JShellTool.java:920)
	at org.netbeans.modules.jshell.tool.JShellTool.run(JShellTool.java:902)
	at org.netbeans.modules.jshell.tool.JShellTool.startUpRun(JShellTool.java:847)
	at org.netbeans.modules.jshell.tool.JShellTool.resetState(JShellTool.java:787)
	at org.netbeans.modules.jshell.tool.JShellLauncher.resetState(JShellLauncher.java:226)
	at org.netbeans.modules.jshell.tool.JShellLauncher.ensureLive(JShellLauncher.java:214)
	at org.netbeans.modules.jshell.tool.JShellLauncher.getJShell(JShellLauncher.java:220)
	at org.netbeans.modules.jshell.support.ShellSession.initJShell(ShellSession.java:773)
	at org.netbeans.modules.jshell.support.ShellSession.getJShell(ShellSession.java:332)
	at org.netbeans.modules.jshell.support.ShellSession.lambda$null$123(ShellSession.java:537)
	at org.netbeans.modules.jshell.model.ConsoleModel$ModelAccImpl.execute(ConsoleModel.java:1127)
	at org.netbeans.modules.jshell.support.ShellSession.lambda$start$124(ShellSession.java:533)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
	at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
	at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)