Frank Steffahn

I don't know how much of an argument this is, but in my opinion the methods `map_or` and `map_or_else` are terribly named anyways, because they don't actually constitute a “mapping”...

> &mut guess --> guess.match { v => &mut v } @truppelito careful, this will make a difference since the `v` binding moves the value whereas the original case had...

I don't understand this section talking about _“Method call chains will not lifetime extend their arguments. Match statements, however, are notorious for having lifetime extension.”_ I thought that temporary scopes...

The RFC says it “generalizes the [safe_unsafe_trait_methods RFC](https://rust-lang.github.io/rfcs/2316-safe-unsafe-trait-methods.html)”, then describes the status quo as “This allows code that knows it is calling a safe implementation of an unsafe trait method...

🤔... semi-serious idea: perhaps backslash could be used in code: `foo\bar`. That doesn't even tokenize at the moment, so it's fully backwards compatible. Too bad neither URLs not toml supports...

> @jyn514 what does the YOLO stand for ? Proabably “[you only live once](https://en.wikipedia.org/wiki/YOLO_(aphorism))”, which is > a call to live life to its fullest extent, even embracing behavior which...

I’ll test that shortly…

Yes it does work, thanks :-) But that should probably be better documented (or get a dedicated flag anyways, assuming that `-vv` might also add some other additional output that...

I’ve added a short comment to an existing issue [#1258](https://github.com/rust-lang/reference/issues/1258); but feel free to open a new one if you think that’s more useful.

@rustbot label regression-from-stable-to-nightly, I-unsound, A-mir-opt, T-compiler