### Please describe the problem.

I am unable to copy files from one git-annex repo to another, either using `copy --from=...' from the destination repo or `--to=...' from the source repo.

Even with the added output from `--debug` I have no idea what is going wrong. The example below focusses on one file, but I think no files work.

`git annex unused` shows `partially transferred data` after the failures. As far as I can tell, the rsync commands that copy the files to `.git/annex/objects/tmp` are working, so I guess the failure happens after that.

From the source repo, located at `/home/james/w/annex-neu`:

	james copter annex-neu $ git remote show -n nature
	* remote nature
	  Fetch URL: /d/nature-ext2/falsifian/w/annex-neu
	  Push  URL: /d/nature-ext2/falsifian/w/annex-neu
	  HEAD branch: (not queried)
	  Remote branches: (status not queried)
	    git-annex
	    master
	    synced/git-annex
	    synced/master
	  Local ref configured for 'git push' (status not queried):
	    (matching) pushes to (matching)

	james copter annex-neu $ git annex copy --to=nature datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz
	copy datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz (to nature...)


	  failed to send content to remote



	  failed to send content to remote
	failed
	git-annex: copy: 1 failed

And with `--debug`:

	james copter annex-neu $ git annex copy --debug --to=nature datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz                                    [2021-06-05 20:24:58.016674809] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","show-ref","git-annex"]
	[2021-06-05 20:24:58.021106113] process done ExitSuccess                        
	[2021-06-05 20:24:58.021381484] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","show-ref","--hash","refs/heads/git-annex"]
	[2021-06-05 20:24:58.025170816] process done ExitSuccess                        [2021-06-05 20:24:58.025705324] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","log","refs/heads/git-annex..803d71e5e3f15ee4a2a30e63c5e0e9faccf0defe","--pretty=%H","-n1"]                                                   [2021-06-05 20:24:58.029655191] process done ExitSuccess                        [2021-06-05 20:24:58.030257913] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","log","refs/heads/git-annex..4a7de0d2b9a7f4a2b9cf88c57636a8388
	6f6b340","--pretty=%H","-n1"]
	[2021-06-05 20:24:58.034210664] process done ExitSuccess
	[2021-06-05 20:24:58.034470983] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","log","refs/heads/git-annex..bbfde8eb1c05e46c1a4e25719c8eb0418
	9fa7cf2","--pretty=%H","-n1"]                                                   
	[2021-06-05 20:24:58.038954155] process done ExitSuccess
	[2021-06-05 20:24:58.039404429] chat: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","cat-file","--batch"]
	[2021-06-05 20:24:58.039881197] chat: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","cat-file","--batch-check=%(objectname) %(objecttype) %(object
	size)"]
	[2021-06-05 20:24:58.050584672] read: git ["config","--null","--list"]
	[2021-06-05 20:24:58.053085725] process done ExitSuccess
	[2021-06-05 20:24:58.053918467] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","symbolic-ref","-q","HEAD"]
	[2021-06-05 20:24:58.056598571] process done ExitSuccess
	[2021-06-05 20:24:58.056750274] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","show-ref","refs/heads/master"]
	[2021-06-05 20:24:58.059953296] process done ExitSuccess
	[2021-06-05 20:24:58.060270357] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","ls-files","--stage","-z","--","datasets/reddit/files.pushshif
	t.io/reddit/daily/RS_2019_10_01.gz"]
	[2021-06-05 20:24:58.060602372] chat: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","cat-file","--batch-check=%(objectname) %(objecttype) %(object
	size)","--buffer"]
	[2021-06-05 20:24:58.061149131] chat: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","cat-file","--batch=%(objectname) %(objecttype) %(objectsize)"
	,"--buffer"]
	[2021-06-05 20:24:58.061754169] chat: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","cat-file","--batch=%(objectname) %(objecttype) %(objectsize)"
	,"--buffer"]
	copy datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz (to nature
	...) 
	[2021-06-05 20:24:58.124257351] read: cp ["--reflink=always","--preserve=timesta
	mps",".git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47b
	c1bf3a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be
	3400a47bc1bf3a46253646b710579b9162560cea087.gz","../../../../nature-ext2/falsifi
	an/w/annex-neu/.git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc
	1bf3a46253646b710579b9162560cea087.gz"]
	[2021-06-05 20:24:58.125931854] process done ExitFailure 1
	[2021-06-05 20:24:58.12621772] read: rsync ["--progress","--inplace","--perms","
	.git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a
	46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a4
	7bc1bf3a46253646b710579b9162560cea087.gz","../../../../nature-ext2/falsifian/w/a
	nnex-neu/.git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a4
	6253646b710579b9162560cea087.gz"]
	100%  288.37 MiB      330 MiB/s 0s  [2021-06-05 20:24:59.003840882] process done
	 ExitSuccess

	[2021-06-05 20:24:59.004436111] read: rsync ["--progress","--inplace","--perms",
	".git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3
	a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a
	47bc1bf3a46253646b710579b9162560cea087.gz","../../../../nature-ext2/falsifian/w/
	annex-neu/.git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a
	46253646b710579b9162560cea087.gz"]
	100%  288.37 MiB      463 MiB/s 0s [2021-06-05 20:24:59.629830876] process done
	ExitSuccess

	  failed to send content to remote

	[2021-06-05 20:24:59.631304163] read: rsync ["--progress","--inplace","--perms",
	".git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3
	a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a
	47bc1bf3a46253646b710579b9162560cea087.gz","../../../../nature-ext2/falsifian/w/
	annex-neu/.git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a
	46253646b710579b9162560cea087.gz"]
	100%  288.37 MiB      462 MiB/s 0s [2021-06-05 20:25:00.257185993] process done
	ExitSuccess

	[2021-06-05 20:25:00.257891486] read: rsync ["--progress","--inplace","--perms",
	".git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3
	a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a
	47bc1bf3a46253646b710579b9162560cea087.gz","../../../../nature-ext2/falsifian/w/
	annex-neu/.git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a
	46253646b710579b9162560cea087.gz"]
	100%  288.37 MiB      437 MiB/s 0s [2021-06-05 20:25:00.92075523] process done E
	xitSuccess

	  failed to send content to remote
	failed
	[2021-06-05 20:25:00.921692771] process done ExitSuccess
	[2021-06-05 20:25:00.921771903] process done ExitSuccess
	[2021-06-05 20:25:00.921837622] process done ExitSuccess
	git-annex: copy: 1 failed


Trying in the other direction (note /home/falsifian is a symlink to james):

	james copter annex-neu $ git remote show -n local                               * remote local
	  Fetch URL: /home/falsifian/w/annex-neu
	  Push  URL: /home/falsifian/w/annex-neu
	  HEAD branch: (not queried)
	  Remote branches: (status not queried)
	    git-annex
	    master                                                                          synced/git-annex                                                                synced/master                                                                 Local ref configured for 'git push' (status not queried):                         (matching) pushes to (matching)                                             james copter annex-neu $ git annex get --debug --from=local datasets/reddit/file
	s.pushshift.io/reddit/daily/RS_2019_10_01.gz
	[2021-06-05 20:26:43.459693059] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","show-ref","git-annex"]
	[2021-06-05 20:26:43.4637773] process done ExitSuccess
	[2021-06-05 20:26:43.464083545] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","show-ref","--hash","refs/heads/git-annex"]
	[2021-06-05 20:26:43.467747946] process done ExitSuccess
	[2021-06-05 20:26:43.468371444] read: git ["--git-dir=.git","--work-tree=.","--l
	iteral-pathspecs","log","refs/heads/git-annex..2585bc984868658a30bac238f343e14ee
	0ab4a40","--pretty=%H","-n1"]
	[2021-06-05 20:26:43.472230994] process done ExitSuccess
	[2021-06-05 20:26:43.472821833] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","log","refs/heads/git-annex..4026e21e431b23f3ed8bab4a59d076a07eb38aba","--pretty=%H","-n1"]
	[2021-06-05 20:26:43.476524704] process done ExitSuccess
	[2021-06-05 20:26:43.476704328] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","log","refs/heads/git-annex..4a7de0d2b9a7f4a2b9cf88c57636a83886f6b340","--pretty=%H","-n1"]
	[2021-06-05 20:26:43.480419871] process done ExitSuccess
	[2021-06-05 20:26:43.480903262] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","cat-file","--batch"]
	[2021-06-05 20:26:43.481438522] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","cat-file","--batch-check=%(objectname) %(objecttype) %(objectsize)"]
	[2021-06-05 20:26:43.484464329] read: git ["config","--null","--list"]
	[2021-06-05 20:26:43.484899963] read: git ["config","--null","--list"]
	[2021-06-05 20:26:43.494876192] process done ExitSuccess
	[2021-06-05 20:26:43.495606623] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","symbolic-ref","-q","HEAD"]
	[2021-06-05 20:26:43.498087081] process done ExitSuccess
	[2021-06-05 20:26:43.498254949] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","show-ref","refs/heads/master"]
	[2021-06-05 20:26:43.50112263] process done ExitSuccess
	[2021-06-05 20:26:43.501446299] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","ls-files","--stage","-z","--","datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz"]
	[2021-06-05 20:26:43.501858278] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","cat-file","--batch-check=%(objectname) %(objecttype) %(objectsize)","--buffer"]
	[2021-06-05 20:26:43.503867361] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","cat-file","--batch=%(objectname) %(objecttype) %(objectsize)","--buffer"]
	[2021-06-05 20:26:43.504653623] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","cat-file","--batch=%(objectname) %(objecttype) %(objectsize)","--buffer"]
	[2021-06-05 20:26:43.50750836] chat: git ["--git-dir=.git","--work-tree=.","--li
	teral-pathspecs","cat-file","--batch"]
	[2021-06-05 20:26:43.50796496] chat: git ["--git-dir=.git","--work-tree=.","--li
	teral-pathspecs","cat-file","--batch-check=%(objectname) %(objecttype) %(objectsize)"]
	get datasets/reddit/files.pushshift.io/reddit/daily/RS_2019_10_01.gz (from local...)
	[2021-06-05 20:26:43.568982372] read: cp ["--reflink=always","--preserve=timesta
	mps","../../../../../home/falsifian/w/annex-neu/.git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz",".git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz"]
	[2021-06-05 20:26:43.571638865] process done ExitFailure 1
	[2021-06-05 20:26:43.572002434] read: rsync ["--progress","--inplace","--perms","../../../../../home/falsifian/w/annex-neu/.git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz",".git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz"]
	100%  288.37 MiB      351 MiB/s 0s   [2021-06-05 20:26:44.396269512] process don
	e ExitSuccess

	  failed to retrieve content from remote

	[2021-06-05 20:26:44.397675637] read: rsync ["--progress","--inplace","--perms","../../../../../home/falsifian/w/annex-neu/.git/annex/objects/vv/Km/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz",".git/annex/tmp/SHA256E-s302380112--fb63e37bf5af350af35be3400a47bc1bf3a46253646b710579b9162560cea087.gz"]
	0%    32 KiB           23 MiB/s 12s[2021-06-05 20:26:45.0364163] process done Ex
	itSuccess

	  failed to retrieve content from remote
	failed
	[2021-06-05 20:26:45.037805309] process done ExitSuccess
	[2021-06-05 20:26:45.03799324] process done ExitSuccess
	[2021-06-05 20:26:45.038069266] process done ExitSuccess
	[2021-06-05 20:26:45.038244936] process done ExitSuccess
	[2021-06-05 20:26:45.03831897] process done ExitSuccess
	git-annex: get: 1 failed


### What steps will reproduce the problem?

I don't know how to reproduce this on a different repo. This is the first time I've seen this. I haven't had trouble in the past.


### What version of git-annex are you using? On what operating system?

	james copter annex-neu $ git annex version
	git-annex version: 8.20200810
	build flags: Assistant Webapp Pairing S3 WebDAV Inotify DBus DesktopNotify TorrentParser MagicMime Feeds Testsuite
	dependency versions: aws-0.22 bloomfilter-2.0.1.0 cryptonite-0.27 DAV-1.3.4 feed-1.3.0.1 ghc-8.8.4 http-client-0.6.4.1 persistent-sqlite-2.10.6.2 torrent-10000.1.1 uuid-1.3.13 yesod-1.6.1.0
	key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 BLAKE2B256E BLAKE2B256 BLAKE2B512E BLAKE2B512 BLAKE2B160E BLAKE2B160 BLAKE2B224E BLAKE2B224 BLAKE2B384E BLAKE2B384 BLAKE2BP512E BLAKE2BP512 BLAKE2S256E BLAKE2S256 BLAKE2S160E BLAKE2S160 BLAKE2S224E BLAKE2S224 BLAKE2SP256E BLAKE2SP256 BLAKE2SP224E BLAKE2SP224 SHA1E SHA1 MD5E MD5 WORM URL X*
	remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar git-lfs hook external
	operating system: linux x86_64
	supported repository versions: 8
	upgrade supported from repository versions: 0 1 2 3 4 5 6 7
	local repository version: 8
	james copter annex-neu $ uname -a
	Linux copter 4.9.0-15-amd64 #1 SMP Debian 4.9.258-1 (2021-03-08) x86_64 GNU/Linux


### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

git-annex is awesome! I am using it a lot.

[[!tag projects/datalad]]

> [[done]] --[[Joey]]
