Add --crash flag to crash and print stack trace on panic

environment.go

@@ -41,6 +41,7 @@ type environment struct {
 		logDirectory string
 		configFile   string
 		verbose      bool
+		crash        bool
 	}
 
 	// running stores whether the environment is currently running.
@@ -282,7 +283,12 @@ func (this *environment) runRunnable(ctx context.Context, actor Runnable) (stopE
 	for {
 		// run actor
 		lastStart := time.Now()
-		err := panicWrapCtx(ctx, actor.Run)
+		var err error
+		if this.flags.crash {
+			err = actor.Run(ctx)
+		} else {
+			err = panicWrapCtx(ctx, actor.Run)
+		}
 
 		// detect context cancellation
 		if ctxErr := ctx.Err(); ctxErr != nil {

phases.go

@@ -24,6 +24,7 @@ func (this *environment) phase10FlagParsing() bool {
 	flagLogDirectory  := set.Flag('l', "log-directory", "Write logs to the specified directory", cli.ValString)
 	flagConfigFile    := set.Flag('c', "config-file",   "Use this configuration file", cli.ValString)
 	flagVerbose       := set.Flag('v', "verbose",       "Enable verbose output/logging", nil)
+	flagCrash         := set.Flag(0,   "crash",         "Crash when an actor panics", nil)
 
 	// ask actors to add flags
 	actors, done := this.actors.RBorrow()
@@ -60,6 +61,9 @@ func (this *environment) phase10FlagParsing() bool {
 	if _, ok := flagVerbose.First(); ok {
 		this.flags.verbose = true
 	}
+	if _, ok := flagCrash.First(); ok {
+		this.flags.crash = true
+	}
 	return true
 }