The following statement will throw an URISyntaxException whose message
contains a '%'. JShell fails to display the exception and exits instead.

jshell> URI u = new URI("http", null, "h", -1, "a" + (char)0x04, null, null);

Exception in thread "main" java.util.IllegalFormatFlagsException: Flags = '0'
        at java.base/java.util.Formatter$FormatSpecifier.checkText(Formatter.java:3191)
        at java.base/java.util.Formatter$FormatSpecifier.<init>(Formatter.java:2878)
        at java.base/java.util.Formatter.parse(Formatter.java:2713)
        at java.base/java.util.Formatter.format(Formatter.java:2655)
        at java.base/java.io.PrintStream.format(PrintStream.java:1053)
        at java.base/java.io.PrintStream.printf(PrintStream.java:949)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.error(JShellTool.java:728)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.errormsg(JShellTool.java:867)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.displayEvalException(JShellTool.java:3451)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.displayException(JShellTool.java:3425)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.displayException(JShellTool.java:3418)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.handleEvent(JShellTool.java:3582)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.processSource(JShellTool.java:3550)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.processSourceCatchingReset(JShellTool.java:1301)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.processInput(JShellTool.java:1203)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.run(JShellTool.java:1176)
        at jdk.jshell/jdk.internal.jshell.tool.JShellTool.start(JShellTool.java:975)
        at jdk.jshell/jdk.internal.jshell.tool.JShellToolBuilder.start(JShellToolBuilder.java:254)
        at jdk.jshell/jdk.internal.jshell.tool.JShellToolProvider.main(JShellToolProvider.java:120)