require.mysql.server for 5.7.12 version and Ubuntu freezing

[johndark]

I trying to use:

require.mysql.server(
    version='5.7',
    password='blabla'
)

after some actions in console output I see

out: Processing triggers for systemd (229-4ubuntu5) ...
out: Processing triggers for ureadahead (0.100.0-19) ...

and fabric is freezed, nothing happened a lot of time.
I exculed command started('mysql') in _server_debian(version, password)method. It works well now, no any freezes.