Error in post-command-hook (vertico--exhibit): (void-function orderless-highlight-matches)

[conao3]

Error in post-command-hook (vertico--exhibit): (void-function orderless-highlight-matches)

[minad]

Yes, in case you want to use Orderless with Vertico, it is necessary to install Orderless before activating vertico-mode. Otherwise you will observe this load error. I haven't found a way to avoid this problem. At least this is not an Orderless issue, but purely the fault of Vertico (and similarly of Corfu).

See the problematic code here: https://github.com/minad/vertico/blob/27c72e6b90944239d6ac2510d34f91a6c3cb95da/vertico.el#L269-L273

[conao3]

Thanks @minad! and sorry @oantolin for an unrelated issue, ignore me.
Let's move to vertico issue board.

[minad]

I've already pushed a fix minad/vertico@5ed4530.

The fix is not perfect however. With the fix, the very first run of Vertico will NOT enjoy optimized deferred highlighting. This happens when orderless has not been loaded yet, and will be loaded lazily by completion-all-completions at a time when the advices have already been installed. I don't think a perfect fix is possible, since we have some kind of circular load order dependency here. But at least the user will not observe issues and after the first completion session everything will be fast.

My recommendation is to always require orderless such that it is already loaded when vertico runs for the first time.

[conao3]

Thanks for that quick fix! I try that.