Weird behaviour of lenses in type definition

[giltho]

Hello hello,

I have some code that triggers a weird behaviour with the lenses in 1.18.0~5.2preview

It might be be because of the unusual type t = ... = ..., I'm not quite sure.
It seems to have the same behaviour to all my other type definitions with the same pattern, as long as the variant has at least one argument

This is not preventing any work so I'd say this is fairly low priority

[voodoos]

Thanks for your report @giltho.

Does the weird behavior persists if you remove the deriver ?

[giltho]

No, it looks like removing the deriver stops this behaviour