…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#122015 (Add better explanation for `rustc_index::IndexVec`)
 - rust-lang#122061 (Clarify FatalErrorHandler)
 - rust-lang#122062 (Explicitly assign constructed C++ classes)
 - rust-lang#122072 (Refer to "slice" instead of "vector" in Ord and PartialOrd trait impl of slices)
 - rust-lang#122088 (Remove unnecessary fixme on new thread stack size)
 - rust-lang#122094 (Remove outdated footnote "missing-stack-probe" in platform-support)
 - rust-lang#122107 (Temporarily make allow-by-default the `non_local_definitions` lint)
 - rust-lang#122109 (compiletest: Add a `//@ needs-threads` directive)

Failed merges:

 - rust-lang#122104 (Rust is a proper name: rust → Rust)

r? `@ghost`
`@rustbot` modify labels: rollup

Rust is a proper name: rust → Rust

I only went over the library where it might be user-visible -- I noticed this in the `time` docs.

…llaumeGomez

Rollup of 10 pull requests

Successful merges:

 - rust-lang#121863 (silence mismatched types errors for implied projections)
 - rust-lang#122043 (Apply `EarlyBinder` only to `TraitRef` in `ImplTraitHeader`)
 - rust-lang#122066 (Add proper cfgs for struct HirIdValidator used only with debug-assert)
 - rust-lang#122104 (Rust is a proper name: rust → Rust)
 - rust-lang#122110 (Make `x t miri` respect `MIRI_TEMP`)
 - rust-lang#122114 (Make not finding core a fatal error)
 - rust-lang#122115 (Cancel parsing ever made during recovery)
 - rust-lang#122123 (Don't require specifying unrelated assoc types when trait alias is in `dyn` type)
 - rust-lang#122126 (Fix `tidy --bless` on  ̶X̶e̶n̶i̶x̶ Windows)
 - rust-lang#122129 (Set `RustcDocs` to only run on host)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#122104 - RalfJung:rust, r=ChrisDenton

Rust is a proper name: rust → Rust

I only went over the library where it might be user-visible -- I noticed this in the `time` docs.