[Haskell-cafe] emacs problem : haskell mode keeps hanging to report types, renders emacs useless

[David Sorokin]

Hi Sean,

Did you try another mode which was called «deprecated» once?

	(require 'haskell-process)
	(add-hook 'haskell-mode-hook 'inf-haskell-mode)

I personally use only this mode as I very appreciate a Lisp-like bottom-up development.

Best regards,
David Sorokin


> 24 нояб. 2017 г., в 1:11, Sean Matthews <seanmatthews1 at gmail.com> написал(а):
> 
> Alas I spoke too soon, and my problem is still there.  So it is back to the cafe, looking for suggestions.  Here is my problem in more detail:
> 
>  - I am running a windows system. (note Windows, not Unix, Linux, OS X, or any other Unix-a-like).
> 
>  - I have a clean emacs installation - only thing I have done is to install haskell-mode using the install-package function.
> 
>  - I start-up interactive haskell mode (C-c interactive-haskell-mode, C-c C-l (and I get a parsing complaint, but we ignore that)).
> 
> [at this point I have a live haskell process that I can interact with]
> 
>  - I load my file (not large) into haskell.
> 
>  - Emacs starts persisting in telling me in the Echo region the type of the term under the cursor - all the time - and locks down to do this.
> 
>  - The type report uses unicode text to do this (note that if I ask for the type with C-c C-t or C-c C-i, I also get the type, but using ascii characters, so it does not appear to be the same functionality that is being triggered - if I turn off haskell-doc then the problem continues).
> 
> Anybody any suggestions, recognise this problem, or even just an address where I can submit a bug report?
> I cannot be the only person trying to work with haskell mode on windows.
> 
> Thanks
> 
> Sean Matthews
> 
> On Sun, Nov 5, 2017 at 8:24 PM, Sean Matthews <seanmatthews1 at gmail.com <mailto:seanmatthews1 at gmail.com>> wrote:
> Problem fixed. Not an interesting problem, either. Turns out that I had not quite completely cleaned out my emacs before reinstallation.
> 
> Many thanks,
> 
> Sean
> 
> On Sun, Nov 5, 2017 at 10:46 AM, Saurabh Nanda <saurabhnanda at gmail.com <mailto:saurabhnanda at gmail.com>> wrote:
> 
> 1. Exact behavior is that Emacs freezes for about a minute and displays (in bold) in the type of the word I'm over.
>     Thus, I was trying to edit a small a-list with dummy 0.000s in the range.  Every third keystroke, emacs stopped to tell me that
>     my cursor was over 0.000::Double and I have to wait an indeterminate time (at least tens of seconds, sometimes a minute or more)
>     to get control back.
> 
> 
> So, the underlying mechanism to determine type at current cursor position isn't very fast. In spacemacs+intero C-c C-t (or C-c C-i) takes anywhere between 1 to 10 sec for me. Something in your setup has made this lookup automatic. It's trying to determine the type as your browse around your source code. Do you have any idea what could have caused that?
> 
> You could try one more thing. Try delivering a SIGUSR2 to the Emacs process when it's stuck. It will stop doing whatever is holding it up and drop you into some sort of a debugger. That can give you some clues about what is causing this behaviour in your setup.
> 
> -- Saurabh.
> 
> 
> 
> -- 
> Sean Matthews
> seanmatthews1 at gmail.com <mailto:seanmatthews1 at gmail.com> / +49 1515 800 1901 <tel:+49%201515%208001901>
> 
> 
> -- 
> Sean Matthews
> seanmatthews1 at gmail.com <mailto:seanmatthews1 at gmail.com> / +49 1515 800 1901
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