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

…llot

Add an internal lint that warns when accessing untracked data

Some methods access data that is not tracked by the query system and should be used with caution. As suggested in rust-lang#128815 (comment), in this PR I propose a lint (modeled on the `potential_query_instability` lint) that warns when using some specially-annotatted functions.

I can't tell myself if this lint would be that useful, compared to renaming `Steal::is_stolen` to `is_stolen_untracked`. This would depend on whether there are other functions we'd want to lint like this. So far it seems they're called `*_untracked`, which may be clear enough.

r? `@oli-obk`

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

…-dead

Get rid of `predicates_defined_on`

This is the uncontroversial part of rust-lang#129532. This simply inlines the `predicates_defined_on` into into `predicates_of`. Nothing should change here logically.