[wbl]

https://pkg.go.dev/errors#Is and https://pkg.go.dev/fmt#Errorf clearly state that there is a way to match these errors if the package exposes the values, which the stdlib does.

[Yoric]

Which only works when the error itself doesn't contain any information.

It's better than nothing, of course.

[the_gipsy]

Ah okay, it seems to work because errors are pointers, and errors.Is just checks for equality.