Lisp error: (wrong-type-argument stringp nil)

[Alex Ott]

You can try to add this patch to this repository -
https://github.com/pheaver/haskell-mode

On Tue, Dec 20, 2011 at 9:50 AM, Leo <sdl.web at gmail.com> wrote:
>
> GNU Emacs 23.3.50.1 (x86_64-apple-darwin10.8.0, Carbon Version 1.6.0 AppKit 1038.36)
>  of 2011-12-11 on localhost
>
> I am getting an error when opening .hs files:
>
> Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>  string-match("[ \f    \n^M^K]+" nil 0)
>  split-string(nil)
>  haskell-flymake-init()
>  flymake-start-syntax-check()
>  flymake-after-save-hook()
>  run-hooks(after-save-hook)
>  basic-save-buffer()
>  save-buffer(1)
>  call-interactively(save-buffer nil nil)
>
>
> _patch_:
>
> --- a/haskell-mode.el
> +++ a/haskell-mode.el
> @@ -606,7 +606,8 @@
>  (defun haskell-flymake-init ()
>   "Flymake init function for Haskell.
>  To be added to `flymake-init-create-temp-buffer-copy'."
> -  (let ((checker-elts (split-string haskell-saved-check-command)))
> +  (let ((checker-elts (and haskell-saved-check-command
> +                          (split-string haskell-saved-check-command))))
>     (list (car checker-elts)
>          (append (cdr checker-elts)
>                  (list (flymake-init-create-temp-buffer-copy
>
>
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-- 
With best wishes,                    Alex Ott
http://alexott.net/
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Skype: alex.ott