…istent with `Mutex` and `RwLock`

`Mutex` prints `<locked>` as a field value when its inner value cannot be accessed, but the lazy types print a fixed string like "`OnceCell(Uninit)`". This could cause confusion if the inner type is a unit type named `Uninit` and does not respect the pretty-printing flag. With this change, the format message is now "`OnceCell(<uninit>)`", consistent with `Mutex`.

Like the other CStr and CString error types, make a re-export for
std::ffi::FromBytesUntilNulError.

This seems to have slipped through the cracks in the
cstr_from_bytes_until_nul implementation and core_c_str migration.

Tracking Issue: rust-lang#95027

…tolnay

Make `Debug` representations of `[Lazy, Once]*[Cell, Lock]` consistent with `Mutex` and `RwLock`

`Mutex` prints `<locked>` as a field value when its inner value cannot be accessed, but the lazy types print a fixed string like "`OnceCell(Uninit)`". This could cause confusion if the inner type is a unit type named `Uninit` and does not respect the pretty-printing flag. With this change, the format message is now "`OnceCell(<uninit>)`", consistent with `Mutex`.

…r=dtolnay

Re-export core::ffi::FromBytesUntilNulError in std::ffi

Like the other CStr and CString error types, make a re-export for std::ffi::FromBytesUntilNulError.

This seems to have slipped through the cracks in the cstr_from_bytes_until_nul implementation and core_c_str migration.

Tracking Issue: rust-lang#95027

…mulacrum

Resolve correct archive version name in `opt-dist`

Should resolve the master part of rust-lang#113784.

r? `@Mark-Simulacrum`

Add missing rvalues to smir

Added few missing rvalues to smir, not entirely confident about changes to `Aggregate`

cc rust-lang/project-stable-mir#13

r? `@oli-obk`

…lcnr

clean up after 113312

Minor edits for rust-lang#113312

cc ``@RalfJung``
r? ``@lcnr``

…earth

Update lexer emoji diagnostics to Unicode 15.0

This replaces the `unic-emoji-char` dep tree (which hasn't been updated for a while) with `unicode-properties` crate which contains Unicode 15.0 data.

Improves diagnostics for added emoji characters in recent years. (See tests).

cc rust-lang#101840

cc ``@Manishearth``

…-then-upcast, r=lcnr

Detect trait upcasting through struct tail unsizing in new solver select

Oops, we were able to hide trait upcasting behind a parent unsize goal that evaluated to `Certainty::Yes`. Let's do rematching for `Certainty::Yes` unsize goals with `BuiltinImplSource::Misc` sources (corresponding to all of the other unsize rules) to make sure we end up selecting any nested goals which may be satisfied via `BuiltinImplSource::TraitUpcasting` or `::TupleUnsizing`.

r? ``@lcnr``