What does this mean?

["William D. Tallman" <wtallman olypen com>]

I launch an application I'm building with 'apptest &', and get the following:

[7] 4560

and then following prompt return:

(apptest:4560): GLib-GObject-CRITICAL **: file gsignal.c: line 1543
(g_signal_connect_closure_by_id): assertion `signal_id > 0' failed

So far, no bugs found in 'apptest'.

I don't have source code for gtk-2.0, so I can't look at gsignal.c, and
I don't know what the number following 'apptest:' means.  Would someone
sort this out for me, please?

Thanks much.

Bill Tallman