Error when cmdmatch completing Unite subcommands

[thalesmello]

Problems summary

I have forked the original unite-cmdmatch in order to get it to work with subcommands completion. I got some level of success. If I type :help un<c-o> I get a Unite source with possible completions for the help command, which the original plugin wasn't capable of doing.

However, for some reason still unknown to me, if I try to get the completions for the Unite command itself, I get an error message.

If I type :Unite c<c-o> I get the following error:

Error detected while processing function <SNR>129_call_unite..unite#start..unite#start#standard..unite#candidates#_recache..unite#init#_candidates_source:
line    3:
E716: Key not present in Dictionary: default_kind, 'is_dummy' : 0, 'is_matched' : 1, 'is_multiline' : 0, 'unite__is_marked' : 0, }
E15: Invalid expression: { 'kind' : source.default_kind, 'is_dummy' : 0, 'is_matched' : 1, 'is_multiline' : 0, 'unite__is_marked' : 0, }
Press ENTER or type command to continue

I suspect that, somehow, Unite is trying to interpret the text it receives as input from the source, as I have only found this behaviour to happen in Unite command itself.

Expected

Unite should be able to complete the list of parameters it receives from the source.

Environment Information

• OS: Mac OS X El Captain
• Vim version: NVIM 0.1.2-dev

Provide a minimal .vimrc with less than 50 lines (Required!)

" Your minimal .vimrc
call dein#add('Shougo/unite.vim')
call dein#add('thalesmello/unite-cmdmatch')
cm <c-o> <Plug>(unite_cmdmatch_complete)

The reproduce ways from Vim starting (Required!)

1. Type in :Unite (notice the space at the end of the command)
2. Press Ctrl + O
3. You should get an error message

Screen shot (if possible)

## Upload the log messages by `:redir` and `:message`

:message

Error detected while processing function <SNR>129_call_unite..unite#start..unite#start#standard..unite#candidates#_recache..unite#init#_candidates_source:
line    3:
E716: Key not present in Dictionary: default_kind, 'is_dummy' : 0, 'is_matched' : 1, 'is_multiline' : 0, 'unite__is_marked' : 0, }
E15: Invalid expression: { 'kind' : source.default_kind, 'is_dummy' : 0, 'is_matched' : 1, 'is_multiline' : 0, 'unite__is_marked' : 0, }
Press ENTER or type command to continue

:redir

"~/.vimrc.bundles.local"
"~/.vimrc.bundles.local" 52L, 1976C written% 

[thalesmello]

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