It said to hit C-c if you want a lazy repository.  I did, so I hit C- 
c.  Then it gave me an error message.

zooko@deharo1:~/playground$ time darcs get http://allmydata.org/ 
source/tahoe/trunk-hashedformat
Copying patches, to get lazy repository hit ctrl-C...

darcs failed:  Couldn't fetch  
`0000001090-8268520b39ee453eb0cc01c820177703dfa9b704aeaa6ee4d66676806054 
46ed'
in subdir patches from sources:

thisrepo:/home/zooko/playground/trunk-hashedformat
repo:http://allmydata.org/source/tahoe/trunk-hashedformat
repo:/var/tmp/tm/tahoe
thisrepo:/home/source/darcs/tahoe/trunk-hashedformat-new
repo:/home/zooko
thisrepo:/var/tmp/tm/zooko
cache:/home/source/.darcs/cache

real    1m6.331s
user    0m18.930s
sys     0m4.250s

I'm guessing this is a relatively minor bug.  Zooko, your fetched repository is
working correctly, right?

Right.  It passes darcs check and it works.

This is one of a couple of issues that relates to apparently incorrect handling or  
missing clean-up when hitting Ctrl-C (C-c) while darcs is running. At present, the 
others are issue1161 and issue1231. I have created a topic/keyword "Control-C 
Ctrl-C C-c" for this and attached it to all these issues.

I would like a volunteer to take a closer look at these issues. It is not 
particularly clear how to proceed, because the effect of hitting Ctrl-C will 
surely depend on the timing of various events. Nevertheless, this may provide an 
interesting puzzle for the right person.

Thanks and best regards
Thorkil

Oops, I just noticed one step we forgot: reproduce the behaviour.  So to
move this ticket forward, we need somebody else to confirm that they can
reproduce this (I vaguely remember seeing something like this before)