Fixes rust-lang#102576

Add lots of comments to this test and enable parts of the test that were
added but never ran.

Signed-off-by: David Wood <david.wood@huawei.com>

`CompiledModule` should not think a DWARF object was emitted when a
bitcode-only compilation has happened, this can confuse archive file
creation (which expects to create an archive containing non-existent dwo
files).

Signed-off-by: David Wood <david.wood@huawei.com>

This allows retrying binding TCP Socket multiple times. This is useful
when using emulators as network might not be available in the beginning.
This was orignally implemented in rust-lang#100316

Signed-off-by: Ayush Singh <ayushsingh1325@gmail.com>

Previously, a `delay_span_bug` was isssued, failing normalization. This
create a `TyKind::Error` in the signature, which caused
`compare_predicate_entailment` to swallow its signature mismatch error,
causing ICEs because no error was emitted.

This patch allows the usage of the `track_caller` annotation on
generators, as well as sets them conditionally if the parent also has
`track_caller` set.

Also add this annotation on the `GenFuture`'s `poll()` function.

…elwoerister

llvm: dwo only emitted when object code emitted

Fixes rust-lang#103932.

`CompiledModule` should not think a DWARF object was emitted when a bitcode-only compilation has happened, this can confuse archive file creation (which expects to create an archive containing non-existent dwo files).

r? `@michaelwoerister`

prevent uninitialized access in black_box for zero-sized-types

Don't read the pointer location in black_box for zero sized types, just emit a memory clobber instead. Addresses  rust-lang#103304 when rust is build against LLVM at HEAD.

Zulip thread: https://rust-lang.zulipchat.com/#narrow/stream/187780-t-compiler.2Fwg-llvm/topic/.28with.20llvm.20at.20HEAD.29.3A.20msan.20error.20in.20core.3A.3Ahint.3A.3Ablack_box

…ckh726

Mark `trait_upcasting` feature no longer incomplete.

This marks the `trait_upcasting` feature no longer incomplete since rust-lang#101336 has been settled for a little while.

r? `@jackh726`

…ble-trait, r=GuillaumeGomez

rustdoc: use javascript to layout notable traits popups

Fixes rust-lang#102576

Preview: https://notriddle.com/notriddle-rustdoc-demos/102576-js-notable-trait/std/iter/trait.Iterator.html#method.step_by

## Before

![image](https://user-images.githubusercontent.com/1593513/200432713-23aa8d49-ba2b-469f-9eab-089e0c174039.png)

## After

![image](https://user-images.githubusercontent.com/1593513/200432735-edd5b53d-e99d-4fc5-9410-8a79e0efdc9d.png)

…n514

Retry binding TCP Socket in remote-test-server

This allows retrying binding TCP Socket multiple times. This is useful when using emulators as network might not be available in the beginning.

This was orignally implemented in rust-lang#100316

Signed-off-by: Ayush Singh <ayushsingh1325@gmail.com>

Fix ICE rust-lang#103748

Fixes rust-lang#103748

Remove `save_and_restore_in_snapshot_flag`, use `ObligationCtxt` more

r? `@lcnr`

…iler-errors

Emit error in `collecting_trait_impl_trait_tys` on mismatched signatures

Previously, a `delay_span_bug` was isssued, failing normalization. This create a `TyKind::Error` in the signature, which caused `compare_predicate_entailment` to swallow its signature mismatch error, causing ICEs because no error was emitted.

fixes rust-lang#104183

r? `@compiler-errors`

… r=eholk

Support `#[track_caller]` on async fns

Adds `#[track_caller]` to the generator that is created when we desugar the async fn.

Fixes rust-lang#78840

Open questions:
- What is the performance impact of adding `#[track_caller]` to every `GenFuture`'s `poll(...)` function, even if it's unused (i.e., the parent span does not set `#[track_caller]`)? We might need to set it only conditionally, if the indirection causes overhead we don't want.