…ulacrum

[beta] Prepare 1.50 beta

r? `@Mark-Simulacrum`

This fixes a bug introduced by rust-lang#79788.

This avoid the hang/oom from rust-lang#79714

When normalizing a projection which results in a cycle, we would
cache the result of `project_type` without the nested obligations
(because they're not needed for inference). This would result in
the nested obligations only being handled once in fulfill, which
would avoid the cycle error.

Fixes rust-lang#79714, a regresion from rust-lang#79305 caused by the removal of
`get_paranoid_cache_value_obligation`.

…ulacrum

[beta] backports

This backports accepted PRs and switches to bootstrapping from the released compiler:

* de-stabilize unsized raw ptr methods for Weak rust-lang#80422
* Use package name for top-level directory in bare tarballs rust-lang#80397
* Prevent caching normalization results with a cycle rust-lang#80246

r? `@Mark-Simulacrum`

…lacrum

[beta] Clippy backport field_reassign_with_default fix

cc `@ebroto` `@Manishearth`

We had multiple complaints about this lint landing in stable 1.49 with a FP hit quite often in real world code. We want to backport the fix for this, so it already gets into 1.50. A stable backport is not warranted by this IMO.

r? `@Mark-Simulacrum`

…acrum

[beta] Update cargo

1 commits in 75d5d8cffe3464631f82dcd3c470b78dc1dda8bb..1a8df6a5196e4cad9a3956867e7e928f2bfaaba4
2020-12-22 18:10:56 +0000 to 2021-01-12 20:10:42 +0000
- [BETA] Fix `links` vars showing up for testing packages (rust-lang/cargo#9068)

[beta] update RLS and rustfmt with backported rustfmt fix

Refs rust-lang#81151 (comment)

r? `@Mark-Simulacrum`

cc `@Xanewok`

Files in the temporary directory are used by ./x.py install.

The struct will allow to store more context on the generated tarballs.

Co-authored-by: Joshua Nelson <jyn514@gmail.com>

Co-authored-by: Joshua Nelson <jyn514@gmail.com>

…ulacrum

[beta] backports

This backports:

*  Update RLS and Rustfmt rust-lang#81027
*  bump rustfmt to v1.4.32 rust-lang#81093
*  Fix handling of malicious Readers in read_to_end rust-lang#80895
*  Fix broken ./x.py install rust-lang#80514
*  Fix x.py install not working with relative prefix rust-lang#80797
*  [security] Update mdbook rust-lang#80688
*  rustdoc: Render visibilities succinctly rust-lang#80368

r? `@ghost`

…u-se

CI: only copy python.exe to python3.exe if the latter does not exist

We're copying the binary to make sure we can call `python3.exe` around, but it seems like the base image of GitHub Actions changed, copying the file before we do so. This PR changes the CI script to only copy the file if it doesn't already exist.

r? `@m-ou-se`
cc `@Mark-Simulacrum`

…ikomatsakis

Make hitting the recursion limit in projection non-fatal

This change was originally made in rust-lang#80246 to avoid future (effectively) infinite loop bugs in projections,
but wundergraph relies on rustc recovering here.

cc rust-lang#80953

r? `@nikomatsakis`

Remove incorrect `delay_span_bug`

The following code is supposed to compile

```rust
use std::ops::BitOr;

pub trait IntWrapper {
    type InternalStorage;
}

impl<T> BitOr for dyn IntWrapper<InternalStorage = T>
where
    Self: Sized,
    T: BitOr + BitOr<Output = T>,
{
    type Output = Self;
    fn bitor(self, _other: Self) -> Self {
        todo!()
    }
}
```

Before this change it would ICE. In rust-lang#70998 the removed logic was added
to provide better suggestions, and the `delay_span_bug` guard was added
to  protect against a potential logic error when returning traits. As it
happens, there are cases, like the one above, where traits can indeed be
returned, so valid code was being rejected.

Fix (but not close) rust-lang#80207.

…lint, r=pnkfelix

introduce future-compatibility warning for forbidden lint groups

We used to ignore `forbid(group)` scenarios completely. This changed in rust-lang#78864, but that led to a number of regressions (rust-lang#80988, rust-lang#81218).

This PR introduces a future compatibility warning for the case where a group is forbidden but then an individual lint within that group is allowed. We now issue a FCW when we see the "allow", but permit it to take effect.

r? ``@Mark-Simulacrum``

rustdoc: Fix visibility of trait and impl items

Fixes rust-lang#81274.

r? `@jyn514`

…lbini

Work around missing -dev packages in solaris docker image.

This should hopefully make the `dist-various-2` docker build work again on CI, which is now blocking everything from getting merged.

r? `@pietroalbini`

…rk-Simulacrum

Update LayoutError/LayoutErr stability attributes

`LayoutError` ended up not making it into 1.49.0, updating the stability attributes to reflect that.

I also pushed `LayoutErr` deprecation back a release to allow 2 releases before the deprecation comes into effect.

This change should be backported to beta.

…ution-via-revert-of-pr-78373, r=matthewjasper

Revert 78373 ("dont leak return value after panic in drop")

Short term resolution for issue rust-lang#80949.

Reopen rust-lang#47949 after this lands.

(We plan to fine-tune PR rust-lang#78373 to not run into this problem.)

[beta] backports

This backports:

* CI: only copy python.exe to python3.exe if the latter does not exist rust-lang#81762
* Make hitting the recursion limit in projection non-fatal rust-lang#81055
* Remove incorrect `delay_span_bug` rust-lang#81532
* introduce future-compatibility warning for forbidden lint groups rust-lang#81556
* Update cargo rust-lang#81755
* rustdoc: Fix visibility of trait and impl items rust-lang#81288
* Work around missing -dev packages in solaris docker image. rust-lang#81229
* Update LayoutError/LayoutErr stability attributes rust-lang#81767
* Revert 78373 ("dont leak return value after panic in drop") rust-lang#81257
* Rename `panic_fmt` lint to `non_fmt_panic` rust-lang#81729

…lbini

Rust 1.50.0 stable release

This PR builds the artifacts for the 1.50.0 stable release, and:

* Cherry-picks e4e460b to fix rust-lang#81208, as recommended in rust-lang#81337 (comment).
* Backports the release notes of 1.49.0 and 1.50.0.

r? `@ghost`
cc `@rust-lang/release`

…etroalbini

Rebuild 1.50.0 stable

This PR rebuilds the 1.50.0 stable release with the following backport:

*  bootstrap: Locate llvm-dwp based on llvm-config bindir rust-lang#81955

cc `@rust-lang/release`

ESP32, ESP8266 and a generic Xtensa target.