The BTS wrote to me:

 > block 652928 by 652926
 Bug #652928 [command-not-found] command-not-found can produce stack trace when you press ^C
 Was not blocked by any bugs.
 Added blocking bug(s) of 652928: 652926
 > thanks
 Stopping processing here.

I think it would be nicer if it also included the summary line for the
blocking bug, 652926 in this case, at some nearby line in in the
transcript.

Thanks,
Ian.