…same line

Remove the `no_debug` feature

Context: rust-lang#29721 (comment)

r? @nikomatsakis

…estebank

resolve, inconsistent binding mode: tweak wording

Now that we can have e.g. `let Ok(x) | Err(x) = res;`, it's no longer appropriate to refer to "the same *match arm*", so let's tweak the wording.

r? @estebank

On mismatched delimiters, only point at empty blocks that are in the same line

We point at empty blocks when we have mismatched braces to detect cases where editors auto insert `}` after writing `{`. Gate this to only the case where the entire span is in the same line so we never point at explicitly empty blocks.

reduce test size for Miri

The larger sizes take quite a while, and there is probably little point in repeating this quite so often.

fix various typos

…opy, r=oli-obk

mir::Local is Copy we can pass it by value in these cases

r? @oli-obk

Add `Layout::dangling()` to return a well-aligned `NonNull<u8>`

Adds a convenient function to `Layout` to create a `NonNull<u8>` out of a layout to be returned on ZST allocations.

This is the first item on the roadmap to support ZSTs in `AllocRef`: rust-lang/wg-allocators#38 (comment)

r? @Amanieu

…mulacrum

Correct version that relaxed orphan rules

Docs say
> Prior to Rust 1.40, if the destination type was not part of the current crate then you couldn't implement From directly

Version 1.41 of Rust introduced the change to the orphan rules - https://blog.rust-lang.org/2020/01/30/Rust-1.41.0.html#relaxed-restrictions-when-implementing-traits - so this should say
> Prior to Rust 1.41...