diff --git a/src/frida.vala b/src/frida.vala
index eb431593..11002e37 100644
--- a/src/frida.vala
+++ b/src/frida.vala
@@ -2602,8 +2602,11 @@ namespace Frida {
 
 		private async void do_perform_operation () {
 			try {
+				printerr (">>> %s\n", this.get_type ().name ());
 				result = yield perform_operation ();
+				printerr ("<<< %s\n", this.get_type ().name ());
 			} catch (GLib.Error e) {
+				printerr ("<<< %s error=\"%s\"\n", this.get_type ().name (), e.message);
 				error = e;
 			}