Co-Authored-By: Jonas Schievink <jonasschievink@gmail.com>

Like how to_lowercase has ὈΔΥΣΣΕΎΣ.

Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>

Here follows the main reverts applied in order to make this commit:

Revert "Rollup merge of rust-lang#60676 - davidtwco:issue-60674, r=cramertj"

This reverts commit 45b0945, reversing
changes made to f6df1f6.

Revert "Rollup merge of rust-lang#60437 - davidtwco:issue-60236, r=nikomatsakis"

This reverts commit 16939a5, reversing
changes made to 12bf981.

Revert "Rollup merge of rust-lang#59823 - davidtwco:issue-54716, r=cramertj"

This reverts commit 62d1574, reversing
changes made to 4eff852.

This commit re-implements the async fn drop order lowering changes so
that it all takes place in HIR lowering, building atop the work done by
`@eddyb` to refactor `Res::Upvar`.

Previously, this types involved in the lowering were constructed in
libsyntax as they had to be used during name resolution and HIR
lowering. This was awful because none of that logic should have existed
in libsyntax.

This commit also changes `ArgSource` to keep a `HirId` to the original
argument pattern rather than a cloned copy of the pattern.

This commit removes the `HirId` from `ArgSource::AsyncFn`, relying on
the fact that only `simple_ident` is used in each of the locations that
previously took the original pattern from the `ArgSource::AsyncFn`.

This commit changes the lowering to stop creating HIR statements,
expressions and patterns directly and instead uses the pre-existing
helper functions.

This commit simplifies the previous logic to construct the statement
vector directly rather than constructing a `Vec` of
`(hir::Stmt, Option<hir::Stmt>)` first.

`ArgSource` is no longer used anywhere, so it can be removed.

This was accidentally regressed in rust-lang#60777 by accident, and we've stopped
printing out step timings on AppVeyor recently reducing the ability for
us to track build times over time!

Also removes stage1, stage2 cfgs being passed to rustc to ensure that
stage1 and stage2 are only differentiated as a group (i.e., only through
not bootstrap).

Fixes rust-lang#57669

…rk-Simulacrum

Fix documentation of `Rc::make_mut` regarding `rc::Weak`.

Closes rust-lang#60961

miri unsizing: fix projecting into a field of an operand

I don't know why this open-coded an operand field projection. Probably this code predates one or more of my refactorings.

Fixes rust-lang/miri#754

r? @oli-obk

…=oli-obk

Fix an ICE with a const argument in a trait

This goes some way towards fixing rust-lang#61383 (the reduced test case is fixed).

…-sane-way, r=eddyb

Re-implement async fn drop order lowering

This PR re-implements the async fn drop order lowering changes so
that it all takes place in HIR lowering, building atop the work done by
@eddyb to refactor `Res::Upvar`.

Previously, this types involved in the lowering were constructed in
libsyntax as they had to be used during name resolution and HIR
lowering. This was awful because none of that logic should have existed
in libsyntax.

This commit also changes `ArgSource` to keep a `HirId` to the original
argument pattern rather than a cloned copy of the pattern.

Only b7aa4ed and 71fb8fa should be reviewed, any other commits
are from rust-lang#61276 (though 447e336 might end up staying in this PR).

As a nice side effect, it also fixes rust-lang#61187 (cc rust-lang#61192).

r? @eddyb
cc @cramertj

…amertj

Add an unusual-conversion example to to_uppercase

Like how to_lowercase has ὈΔΥΣΣΕΎΣ.

Succinctify splice docs

…jasper

Suggest using `as_ref` on `*const T`

Fix rust-lang#21596.

…asper

On TerminatorKind::DropAndReplace still handle unused_mut correctly

Closes rust-lang#61424

- [x] Todo add regression test

…alexcrichton

azure: retry s3 upload if it fails

We had some cases (like [this](https://dev.azure.com/rust-lang/e71b0ddf-dd27-435a-873c-e30f86eea377/_apis/build/builds/370/logs/734) a few hours ago) when uploading to S3 fails with a network error. This retries the upload if it fails.

r? @alexcrichton

…etroalbini

ci: Reenable step timings on AppVeyor

This was accidentally regressed in rust-lang#60777 by accident, and we've stopped
printing out step timings on AppVeyor recently reducing the ability for
us to track build times over time!

…ap, r=alexcrichton

Utilize cfg(bootstrap) over cfg(stage0)

Also removes stage1, stage2 cfgs being passed to rustc to ensure that
stage1 and stage2 are only differentiated as a group (i.e., only through
not bootstrap).

Fixes rust-lang#53582

r? @alexcrichton

…ens, r=varkor

Do not panic in tidy on unbalanced parentheses in cfg's

Fixes rust-lang#60505

…um-cpus, r=alexcrichton

Treat 0 as special value for codegen-units-std

Fixes rust-lang#57669

Add regression test for existential type ICE rust-lang#53457

Closes rust-lang#53457.