alternative to rust-lang#128459

fixes rust-lang#110178

This change allows setting either `build.cargo` or `build.rustc` without requiring
both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Signed-off-by: onur-ozkan <work@onurozkan.dev>

- `new_zeroed` variants move to `new_zeroed_alloc`
- the `write` fn moves to `box_uninit_write`

The remainder will be stabilized in upcoming patches, as
it was decided to only stabilize `uninit*` and `assume_init`.

Link: rust-lang#129416
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

…t` types as local

add Box::as_ptr and Box::as_mut_ptr methods

Unstably implements rust-lang/libs-team#355. Tracking issue: rust-lang#129090.

r? libs-api

bootstrap: improve error recovery flags to curl

alternative to rust-lang#128459

fixes rust-lang#110178

r? ````@Kobzol````

…tabilization, r=dtolnay

library: Move unstable API of new_uninit to new features

- `new_zeroed` variants move to `new_zeroed_alloc`
- the `write` fn moves to `box_uninit_write`

The remainder will be stabilized in upcoming patches, as it was decided to only stabilize `uninit*` and `assume_init`.

…=Kobzol

handle stage0 `cargo` and `rustc` separately

This change allows setting either `build.cargo` or `build.rustc` without requiring both to be set simultaneously, which was not possible previously.

To try it, set `build.rustc` without setting `build.cargo`, and try to bootstrap on clean build.

Blocker for rust-lang#129152

…rnal_private_fields, r=compiler-errors

repr_transparent_external_private_fields: special-case some std types

Fixes rust-lang#129470

```@rustbot``` label +A-lint +L-repr_transparent_external_private_fields

…notriddle

Update minifier to 0.3.1

It adds support for escaped characters.

PR is GuillaumeGomez/minifier-rs#111.

r? ````@notriddle````

Make `rustc_type_ir` build on stable

This PR fixes a handful of issues that appear in `rustc_type_ir` when trying to build the new solver on stable.

r? ```@compiler-errors```
```@bors``` rollup