Catch command line errors and force exit with error code

src/Application.ts

@@ -99,10 +99,20 @@ export default abstract class Application implements Extendable<ApplicationCompo
         await this.init();
 
         // Process command line
-        if (!this.ignoreCommandLine && await this.processCommandLine()) {
-            this.started = true;
-            this.busy = false;
-            return;
+        if (!this.ignoreCommandLine) {
+            let result: boolean;
+            try {
+                result = await this.processCommandLine();
+            } catch (err) {
+                logger.error(err);
+                process.exit(1);
+            }
+
+            if (result) {
+                this.started = true;
+                this.busy = false;
+                return;
+            }
         }
 
         // Security