8178023: jshell tool: crash with ugly message on attempt to add non-existant module pathReviewed-by: jlahoda
8168615: JShell API: jdk.jshell.spi should be a pluggable ServiceLoader SPIReviewed-by: jlahoda
8169519: JShell: Handle start-up failures and hangs gracefully8166581: JShell: locks forever if -R options is wrong8169234: JShell: hangs on startup on some computers caused by hostnameReviewed-by: jlahoda