[[!comment format=mdwn
 username="https://me.yahoo.com/a/EbvxpTI_xP9Aod7Mg4cwGhgjrCrdM5s-#7c0f4"
 subject="seems just ignore errors while adding urls to "unsupported" urls"
 date="2015-08-19T21:59:09Z"
 content="""
actually situation is somewhat similar on linux as well in a sense that annex manages to addurl a file using e.g. file:///./data   url (not sure even if legit) without puking but contains wrong content (empty):

[[!format  sh \"\"\"

% mkdir XXX
% cd XXX
% git init; git annex init
Initialized empty Git repository in /tmp/XXX/.git/
init  ok
(recording state in git...)
% echo 123 > data
% git annex addurl --file=annexed file:///./data
addurl annexed (downloading file:///./data ...) 

ok
(recording state in git...)
% cat annexed 
% git annex drop annexed
drop annexed (checking file:///./data...) (unsafe) 
  Could only verify the existence of 0 out of 1 necessary copies

  Rather than dropping this file, try using: git annex move

  (Use --force to override this check, or adjust numcopies.)
failed
git-annex: drop: 1 failed
% git annex addurl --file=annexedfull file://$PWD/data
addurl annexedfull (downloading file:///tmp/XXX/data ...) 
######################################################################## 100.0%
ok
(recording state in git...)
% cat annexedfull
123
% git annex drop annexedfull                          
drop annexedfull (checking file:///tmp/XXX/data...) ok
(recording state in git...)
% annex version
zsh: command not found: annex
% git annex version
git-annex version: 5.20150812-2

\"\"\"]]
"""]]