followup:

Further debugging revealed that helm-hide-minibuffer-maybe is not guilty
of anything. But for some reason, helm-mode-fuzzy-match /
helm-completion-in-region-fuzzy-match fix the problem, but only using 2+
chars queries. Maybe some other customizations are responsible for that.


aaermolov@gmail.com writes:

> Yes, with some some config fiddling I've seen this crm-based tagging
> wotkflow you describe, but problems were the same.
>
> Suddenly, I tried to remove some customization code for Helm (namely
> this -
> https://github.com/search?q=helm-hide-minibuffer-maybe&type=Code&utf8=✓)
> and it seems proper completion starts working to some extent.
>
> Anyway, thanks for prompt reply and mind seeding! :)
>
>
> John Kitchin <jkitchin@andrew.cmu.edu> writes:
>
>> I can't reproduce that behavior on my end. I see different behavior though.
>> My helm window is titled crm-complete, and the buffer is called
>> *helm-mode-crm-complete*
>>
>> This seems to be the helm core package I am using.
>>
>> helm-core-20170112.917
>>
>> John
>>
>> -----------------------------------
>> Professor John Kitchin
>> Doherty Hall A207F
>> Department of Chemical Engineering
>> Carnegie Mellon University
>> Pittsburgh, PA 15213
>> 412-268-7803
>> @johnkitchin
>> http://kitchingroup.cheme.cmu.edu
>>
>>
>> On Tue, Mar 14, 2017 at 12:24 PM, <aaermolov@gmail.com> wrote:
>>
>>> Hi John,
>>>
>>> no, these do not seem to fix anything. :(
>>>
>>> Namely, the following is still happens:
>>>
>>> 1) I'm pressing C-c C-q then TAB to select freeform input
>>> 2) then there is "org-set-tags" above candidates list and buffer title
>>>    is "*helm-mode-org-set-tags*"
>>> 3) after any input candidates list looks like "[?]<helm query chars>"
>>>    (initial candidates disappeared)
>>>
>>> regards,
>>> Alex
>>>
>>> John Kitchin <jkitchin@andrew.cmu.edu> writes:
>>>
>>> > have you tried these settings:
>>> >
>>> > (setq helm-mode-fuzzy-match t
>>> >       helm-completion-in-region-fuzzy-match t)
>>> >
>>> > According to https://github.com/emacs-helm/helm/wiki/Fuzzy-matching, the
>>> > make fuzzy matching work everywhere.
>>> >
>>> > It seems to work ok for me.
>>> >
>>> > aaermolov@gmail.com writes:
>>> >
>>> >> Hi,
>>> >>
>>> >> I've spotted a problem with completing Org tags with Helm. While Helm is
>>> >> not at least about [fuzzy] completion, when I try to input any
>>> >> completion subsequence, all candidates are gone and variants are
>>> >> shrinked to whatever will be typed.
>>> >>
>>> >> Is there any widely known mistake, that I've stepped into with this
>>> >> case? Can anyone point me to some comprehensible direction?
>>> >>
>>> >> regards,
>>> >> Alex
>>> >
>>> >
>>> > --
>>> > Professor John Kitchin
>>> > Doherty Hall A207F
>>> > Department of Chemical Engineering
>>> > Carnegie Mellon University
>>> > Pittsburgh, PA 15213
>>> > 412-268-7803
>>> > @johnkitchin
>>> > http://kitchingroup.cheme.cmu.edu
>>>