chore: Log error stack in rollup.watch

rollup/watch.js

@@ -77,7 +77,11 @@ function log_css_change({output}) {
 
 function log_error(error) {
 	log(chalk.yellow('Error in: ' +  error.id));
-	log(chalk.red(error.toString()));
+	if (error.stack) {
+		log(chalk.red(error.stack));
+	} else {
+		log(chalk.red(error.toString()));
+	}
 
 	if (error.frame) {
 		log(chalk.red(error.frame));