Vagrant fails to rsync on Win 7 without any reason

[Ľuboš Katrinec]

Windows: 7

Vagrant: 2.2.5

VirtualBox: 6.0.10

Guest OS: centos/6

Host rsync (cygwin): version 3.1.1  protocol version 31

Guest rsync: version 3.0

I experience very strange behavior where vagrant fails to rsync when doing vagrant up or reload. This is most interesting part - it says there was an error but there was none. 

==> default: Rsyncing folder: /cygdrive/c/Users/XXXXX/work/Projects/LXC/vagrant_test/ => /vagrant
There was an error when attempting to rsync a synced folder.
Please inspect the error message below for more info.

Host path: /cygdrive/c/Users/XXXXX/work/Projects/LXC/vagrant_test/
Guest path: /vagrant
Command: "rsync" "--verbose" "--archive" "--delete" "-z" "--copy-links" "--chmod=ugo=rwX" "--no-perms" "--no-owner" "--no-group" "--rsync-path" "sudo rsync" "-e" "ssh -p 2222 -o LogLevel=FATAL -o IdentitiesOnly=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i 'C:/Users/XXXXX/work/Projects/LXC/vagrant_test/.vagrant/machines/default/virtualbox/private_key'" "--exclude" ".vagrant/" "/cygdrive/c/Users/XXXXX/work/Projects/LXC/vagrant_test/" "vag...@127.0.0.1:/vagrant"
Error:

And no wonder - when I launch the rsync command it actually works well:

"rsync" "--verbose" "--archive" "--delete" "-z" "--copy-links" "--chmod=ugo=rwX" "--no-perms" "--no-owner" "--no-group" "--rsync-path" "sudo rsync" "-e" "ssh -p 2222 -o LogLevel=FATAL    -o IdentitiesOnly=yes -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i 'C:/Users/XXXXX/work/Projects/LXC/vagrant_test/.vagrant/machines/default/virtualbox/private_key'" "--exclude" ".vagrant/" "/cygdrive/c/Users/XXXXX/work/Projects/LXC/vagrant_test/" "vag...@127.0.0.1:/vagrant"
sending incremental file list
./
readme.md
vagrantfile
hidden.vagrant/
hidden.vagrant/machines/
hidden.vagrant/machines/default/
hidden.vagrant/machines/default/virtualbox/
hidden.vagrant/machines/default/virtualbox/action_provision
hidden.vagrant/machines/default/virtualbox/action_set_name
hidden.vagrant/machines/default/virtualbox/box_meta
hidden.vagrant/machines/default/virtualbox/creator_uid
hidden.vagrant/machines/default/virtualbox/id
hidden.vagrant/machines/default/virtualbox/index_uuid
hidden.vagrant/machines/default/virtualbox/private_key
hidden.vagrant/machines/default/virtualbox/synced_folders
hidden.vagrant/machines/default/virtualbox/vagrant_cwd
hidden.vagrant/rgloader/
hidden.vagrant/rgloader/loader.rb
vm/
vm/provision.sh
sent 4,622 bytes  received 337 bytes  9,918.00 bytes/sec
total size is 6,263  speedup is 1.26

It does not matter if it is done in cygwin or CMD. The behavior is very same. I tried everything - destroying and removing .vagrant.d from home directory. I also tried installing newer version of rsync on guest OS.

Can anyone help or should I just submit a bug?

[Ľuboš Katrinec]

Solved.

Solution can be found in issue I tracked: 11050