Abnormal JVM exit on wrong DISPLAY setting

An illegal display settng causes a stack trace because the AWT environment cannot be openend, In addition, the terminal stays in raw, non-echo mode, forcing you to blindly type "stty sane" to get it back into a usable state. See the following session log...

Solution: catch the "java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment" and print a nice error message, and in a finally reset the terminal (or do it in the groovysh wrapper script if that is not possible due to the abnormal JVM exit).

— Possible shell snippet —
if $RAW; then
SAVED_MODES=$(stty -g)
trap "stty $SAVED_MODES" EXIT SIGHUP SIGINT SIGQUIT SIGABRT SIGSEGV SIGTERM
stty raw -echo ignbrk brkint inlcr icrnl opost isig
fi

1. start in subshell so stty reset is ensured
   ( startGroovy @project.package@.Console "$@" )

if $RAW; then
stty $SAVED_MODES
fi

— LOG —
thirdparty/groovy > groovysh
Groovy Shell (1.5.6, JVM: 10.0-b19)
Type 'help' or '\h' for help.
----------------------------------------------------------------------------------------------------
groovy:000>
thirdparty/groovy > export DISPLAY=BUGGY
thirdparty/groovy > groovysh
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:101)
at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:130)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:89)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at java.awt.Toolkit$2.run(Toolkit.java:836)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:828)
at sun.swing.SwingUtilities2$AATextInfo.getAATextInfo(SwingUtilities2.java:120)
at javax.swing.plaf.metal.MetalLookAndFeel.initComponentDefaults(MetalLookAndFeel.java:1556)
at javax.swing.plaf.basic.BasicLookAndFeel.getDefaults(BasicLookAndFeel.java:130)
at javax.swing.plaf.metal.MetalLookAndFeel.getDefaults(MetalLookAndFeel.java:1591)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:537)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:577)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230)
at groovy.lang.MetaClassImpl.invokeStaticMethod(MetaClassImpl.java:1105)
at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:749)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:170)
at org.codehaus.groovy.tools.shell.Main.main(Main.groovy:116)
... 6 more

java.lang.IllegalStateException: Shutdown in progress
at java.lang.ApplicationShutdownHooks.add(ApplicationShutdownHooks.java:39)
at java.lang.Runtime.addShutdownHook(Runtime.java:192)
at jline.UnixTerminal.initializeTerminal(UnixTerminal.java:97)
at jline.Terminal.setupTerminal(Terminal.java:75)
at jline.Terminal.getTerminal(Terminal.java:26)
at org.codehaus.groovy.tools.shell.util.ANSI.detect(ANSI.java:48)
at org.codehaus.groovy.tools.shell.util.ANSI.isDetected(ANSI.java:59)
at org.codehaus.groovy.tools.shell.util.ANSI.isEnabled(ANSI.java:70)
at org.codehaus.groovy.tools.shell.util.ANSI$Buffer.attrib(ANSI.java:225)
at org.codehaus.groovy.tools.shell.util.ANSI$Renderer.evaluate(ANSI.java:313)
at org.codehaus.groovy.tools.shell.util.ANSI$Renderer.render(ANSI.java:289)
at org.codehaus.groovy.tools.shell.util.ANSI$RenderWriter.write(ANSI.java:378)
at java.io.PrintWriter.print(PrintWriter.java:559)
at java.io.PrintWriter.println(PrintWriter.java:695)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:912)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:756)
at org.codehaus.groovy.runtime.InvokerHelper.invokePojoMethod(InvokerHelper.java:766)
at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:754)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:170)
at org.codehaus.groovy.tools.shell.Main$_main_closure2.doCall(Main.groovy:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:248)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurrentN(ScriptBytecodeAdapter.java:78)
at org.codehaus.groovy.tools.shell.Main$_main_closure2.doCall(Main.groovy)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:230)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:248)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:756)
at groovy.lang.Closure.call(Closure.java:292)
at groovy.lang.Closure.call(Closure.java:287)
at groovy.lang.Closure.run(Closure.java:368)
at java.lang.Thread.run(Thread.java:619)
WARNING: Abnormal JVM shutdown detected
thirdparty/groovy > *** ECHOLESS CONSOLE HERE ***