Proposal: Make the error type implementor-selectable?

[madsmtm]

Instead of defining the allowed errors returnable by the window handle traits, maybe we should make it an associated type Error instead, similar to e.g. TryFrom::Error? Then libraries that never return an error could make that be Infallible.

[notgull]

This would make the trait not object safe, which I would be skeptical about. Especially since most current implementors of the traits should be providing errors, just in case.

[madsmtm]

Right, conflicts with object safety too, and you do make some fair points