Auto merge of #58048 - SimonSapin:error_type_id, r=Centril
Auto merge of #58048 - SimonSapin:error_type_id, r=Centril

Stabilize std::error::Error::type_id

This should have been part of https://github.com/rust-lang/rust/pull/57834

FCP: https://github.com/rust-lang/rust/issues/27745#issuecomment-373906749

aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust