The following sequence of commands results in a patch that moves the 
files then removes them. I remain rather suspicious of the coalescing 
code in general, but I do have a fix for this specific test case which 
I'll submit shortly.

touch x y
darcs rec -lam "adds"

darcs mv x x2
darcs mv y y2
darcs rec -am "patch"

rm x2 y2
echo 'y' | darcs amend-rec -a

Actually, I'm not 100% confident my fix doesn't introduce an infinite 
loop, so I'll do more playing locally before submitting it.

Haven't got round to doing something useful with the candidate fix, but 
here it is for future reference.

Attachments

• coalescing.dpatch

My coalesce patches (see patch1885) are fixing this but I haven't yet 
come around to removing the objectionable parts of that bundle.

patch1885 has been updated some time ago...