(void-variable lsp-haskell-formatting-provider)
josefs opened this issue · 2 comments
I'm having trouble starting to use lsp-haskell. I've followed the installation instructions but when I open a Haskell file I get:
File mode specification error: (void-variable lsp-haskell-formatting-provider)
What am I doing wrong and how do I fix it? I don't particularly need a formatter and I don't have any installed at the moment.
My currently installed package version:
lsp-mode 8.0.0
lsp-haskell 20220809.2129
I've got the same error and managed to fix it for myself:
- I'm using emacs native
- I had
lsp-haskell
pinned to melpa, which installed version20220809.2129
(latest from github) - I had
lsp-mode
also pinned to melpa, which installed the release version 8.0.0
It turns out that the latest git version of lsp-haskell
uses the macro defcustom-lsp
which was implemented in lsp-mode
in emacs-lsp/lsp-mode@491d667, Oct 27, 2021 but lsp-mode
8.0.0 was released Sep 4, 2021
Or in other words: your lsp-mode
version is too old for lsp-haskell
. And it appears that compiling lsp-haskell
with the missing macro somehow leads to broken byte code rather than aborting the compilation.
How to fix:
- Install the latest git version of
lsp-mode
- Delete the cached compiled
lsp-haskell
(rm -rf ~/.emacs.d/elpa/lsp-haskell-*
) - Reinstall
lsp-haskell
Not sure there's anything to do here