Fix RscriptCommand for new launcher in GraalVM.

com.oracle.truffle.r.engine/src/com/oracle/truffle/r/engine/shell/RscriptCommand.java

@@ -60,7 +60,7 @@ public class RscriptCommand {
         // Either -e options are set or first non-option arg is a file
         if (options.getStringList(EXPR) == null) {
             if (firstNonOptionArgIndex == resultArgsLength) {
-                System.err.println("filename is missing");
+                RCmdOptions.printHelp(RCmdOptions.Client.RSCRIPT, 0);
                 Utils.exit(2);
             } else {
                 options.setValue(FILE, arguments[firstNonOptionArgIndex]);

com.oracle.truffle.r.runtime/src/com/oracle/truffle/r/runtime/Utils.java

@@ -127,7 +127,7 @@ public final class Utils {
      */
     public static RuntimeException exit(int status) {
         RPerfStats.report();
-        if (RContext.getInstance().getOptions().getString(RCmdOption.DEBUGGER) != null) {
+        if (RContext.getInstance() != null && RContext.getInstance().getOptions() != null && RContext.getInstance().getOptions().getString(RCmdOption.DEBUGGER) != null) {
             throw new DebugExitException();
         } else {
             try {