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Rollup of 6 pull requests #96218

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r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

IsakNyberg and others added 27 commits April 14, 2022 00:22
Co-authored-by: Janusz Marcinkiewicz <virrages@gmail.com>
Define a `NotHandle` type, that implements `std::error::Error`, and use
it as the error type in `HandleOrNull` and `HandleOrInvalid`.
Also, make the display messages more specific, and remove the `Copy`
implementation.
This test's expected stderr now includes a count of the number of types
that implment `Error`. This PR introduces two new types, so increment
the number by two.
…=GuillaumeGomez

Remove extra space before a where clause

Remove extra space before where clause in the generated documentation.

The fix is to move the space before the break-line so that it doesn't appear visually but is still here. Removing it completely would create things like this `impl<D> Delta<D>where D: MyTrait` (missing a space before the where) which I don't think we want.

Added two regression test, first one test that the `<br>` is after the space and the second check that the `<br>` is before the spaces.

Before:
![image](https://user-images.githubusercontent.com/3616612/162475212-d4bb6727-ed66-4a55-a4a2-4f55189bf8bd.png)

After:
![image](https://user-images.githubusercontent.com/3616612/162475467-508fd082-60a7-4a8c-b693-8b188e8843e6.png)

r? `@GuillaumeGomez`
…lan-DPC

Refactor loop into iterator; simplify negation logic.

is_dummy should return when a non-dummy is found, but instead is iterated until completion. With some inspiration from line 323 this was refactored to a single line that returns once a single counterexample is found.
interpret: Fix writing uninit to an allocation

When calling `mark_init`, we need to also be mindful of what happens with the relocations! Specifically, when we de-init memory, we need to clear relocations in that range as well or else strange things will happen (and printing will not show the de-init, since relocations take precedence there).

Fixes rust-lang/miri#2068.

Here's the Miri testcase that this fixes (requires `-Zmiri-disable-validation`):
```rust
use std::mem::MaybeUninit;

fn main() { unsafe {
    let mut x = MaybeUninit::<i64>::uninit();
    // Put in a ptr.
    x.as_mut_ptr().cast::<&i32>().write_unaligned(&0);
    // Overwrite parts of that pointer with 'uninit' through a Scalar.
    let ptr = x.as_mut_ptr().cast::<i32>();
    *ptr = MaybeUninit::uninit().assume_init();
    // Reading this back should hence work fine.
    let _c = *ptr;
} }
```
Previously this failed with
```
error: unsupported operation: unable to turn pointer into raw bytes
  --> ../miri/uninit.rs:11:14
   |
11 |     let _c = *ptr;
   |              ^^^^ unable to turn pointer into raw bytes
   |
   = help: this is likely not a bug in the program; it indicates that the program performed an operation that the interpreter does not support

   = note: inside `main` at ../miri/uninit.rs:11:14
```
…=oli-obk

Miri provenance cleanup

Reviewing rust-lang#95826 by `@carbotaniuman` made me realize that we could clean things up a little here.

`@carbotaniuman` please let me know if you're okay with landing this (it will create a lot of conflicts with your PR), or if you'd prefer incorporating the ideas from this PR into yours. I think we want to end up in a situation where the function you called `ptr_reify_alloc` returns just two things, a concrete tag and an offset. Getting an `AllocId` from a concrete tag should be infallible like now. However a concrete tag and `Tag` don't have to be the same type.

r? `@oli-obk`
…rror-type, r=joshtriplett

 Define a dedicated error type for `HandleOrNull` and `HandleOrInvalid`.

Define `NullHandleError` and `InvalidHandleError` types, that implement std::error::Error, and use them as the error types in `HandleOrNull` and `HandleOrInvalid`,

This addresses [this concern](rust-lang#87074 (comment)).

This is the same as rust-lang#95387.

r? ```@joshtriplett```
…homcc

Use futex locks on emscripten.

This switches Emscripten to the futex-based lock implementations, away from pthread.

Tracking issue: rust-lang#93740
@rustbot rustbot added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. labels Apr 19, 2022
@rustbot rustbot added the rollup A PR which is a rollup label Apr 19, 2022
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@bors r+ rollup=never p=5

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bors commented Apr 19, 2022

📌 Commit 7c5b0a7 has been approved by Dylan-DPC

@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label Apr 19, 2022
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bors commented Apr 19, 2022

⌛ Testing commit 7c5b0a7 with merge 4be4887c49fad36d436b3d9f40ab68ab6156b2a3...

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bors commented Apr 19, 2022

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Apr 19, 2022
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The job i686-msvc-2 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)
37 error: aborting due to 2 previous errors


The actual stderr differed from the expected stderr.
Actual stderr saved to D:\a\rust\rust\build\i686-pc-windows-msvc\test\ui\coercion\coerce-issue-49593-box-never.nofallback\coerce-issue-49593-box-never.nofallback.stderr
To only update this specific test, also pass `--test-args coercion\coerce-issue-49593-box-never.rs`


error in revision `nofallback`: 1 errors occurred comparing output.
status: exit code: 1
command: PATH="D:\a\rust\rust\build\i686-pc-windows-msvc\stage2\bin;C:\Program Files (x86)\Windows Kits\10\bin\x64;C:\Program Files (x86)\Windows Kits\10\bin\10.0.22000.0\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x64;C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\bin\HostX64\x86;D:\a\rust\rust\build\i686-pc-windows-msvc\stage0-bootstrap-tools\i686-pc-windows-msvc\release\deps;D:\a\rust\rust\build\i686-pc-windows-msvc\stage0\bin;D:\a\rust\rust\ninja;D:\a\rust\rust\msys2\mingw32\bin;C:\hostedtoolcache\windows\Python\3.10.4\x64\Scripts;C:\hostedtoolcache\windows\Python\3.10.4\x64;C:\msys64\usr\bin;D:\a\rust\rust\sccache;C:\Program Files\MongoDB\Server\5.0\bin;C:\aliyun-cli;C:\vcpkg;C:\cf-cli;C:\Program Files (x86)\NSIS;C:\tools\zstd;C:\Program Files\Mercurial;C:\hostedtoolcache\windows\stack\2.7.5\x64;C:\cabal\bin;C:\ghcup\bin;C:\tools\ghc-9.2.2\bin;C:\Program Files\dotnet;C:\mysql\bin;C:\Program Files\R\R-4.1.3\bin\x64;C:\SeleniumWebDrivers\GeckoDriver;C:\Program Files (x86)\sbt\bin;C:\Program Files (x86)\GitHub CLI;C:\Program Files\Git\bin;C:\Program Files (x86)\pipx_bin;C:\hostedtoolcache\windows\go\1.17.8\x64\bin;C:\hostedtoolcache\windows\Python\3.7.9\x64\Scripts;C:\hostedtoolcache\windows\Python\3.7.9\x64;C:\hostedtoolcache\windows\Ruby\2.5.9\x64\bin;C:\tools\kotlinc\bin;C:\hostedtoolcache\windows\Java_Temurin-Hotspot_jdk\8.0.322-6\x64\bin;C:\npm\prefix;C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\wbin;C:\ProgramData\kind;C:\Program Files\Eclipse Foundation\jdk-8.0.302.8-hotspot\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0;C:\Windows\System32\OpenSSH;C:\ProgramData\Chocolatey\bin;C:\Program Files\Docker;C:\Program Files\PowerShell\7;C:\Program Files\Microsoft\Web Platform Installer;C:\Program Files\dotnet;C:\Program Files\Microsoft SQL Server\130\Tools\Binn;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\120\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\130\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\140\DTS\Binn;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn;C:\Program Files\nodejs;C:\Program Files\OpenSSL\bin;C:\Strawberry\c\bin;C:\Strawberry\perl\site\bin;C:\Strawberry\perl\bin;C:\ProgramData\chocolatey\lib\pulumi\tools\Pulumi\bin;C:\Program Files\TortoiseSVN\bin;C:\Program Files\CMake\bin;C:\ProgramData\chocolatey\lib\maven\apache-maven-3.8.5\bin;C:\Program Files\Microsoft Service Fabric\bin\Fabric\Fabric.Code;C:\Program Files\Microsoft SDKs\Service Fabric\Tools\ServiceFabricLocalClusterManager;C:\Program Files\Git\cmd;C:\Program Files\Git\mingw64\bin;C:\Program Files\Git\usr\bin;C:\Program Files\GitHub CLI;C:\tools\php;C:\Program Files (x86)\sbt\bin;C:\SeleniumWebDrivers\ChromeDriver;C:\SeleniumWebDrivers\EdgeDriver;C:\Program Files\Amazon\AWSCLIV2;C:\Program Files\Amazon\SessionManagerPlugin\bin;C:\Program Files\Amazon\AWSSAMCLI\bin;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin;C:\Program Files (x86)\Microsoft BizTalk Server;C:\Program Files\LLVM\bin;C:\Users\runneradmin\.dotnet\tools;C:\Users\runneradmin\.cargo\bin;C:\Users\runneradmin\AppData\Local\Microsoft\WindowsApps" "D:\\a\\rust\\rust\\build\\i686-pc-windows-msvc\\stage2\\bin\\rustc.exe" "D:\\a\\rust\\rust\\src/test\\ui\\coercion\\coerce-issue-49593-box-never.rs" "-Zthreads=1" "--target=i686-pc-windows-msvc" "--cfg" "nofallback" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "D:\\a\\rust\\rust\\build\\i686-pc-windows-msvc\\test\\ui\\coercion\\coerce-issue-49593-box-never.nofallback" "-A" "unused" "-Crpath" "-O" "-Cdebuginfo=0" "-Lnative=D:\\a\\rust\\rust\\build\\i686-pc-windows-msvc\\native\\rust-test-helpers" "-L" "D:\\a\\rust\\rust\\build\\i686-pc-windows-msvc\\test\\ui\\coercion\\coerce-issue-49593-box-never.nofallback\\auxiliary"
stdout: none
--- stderr -------------------------------
error[E0277]: the trait bound `(): std::error::Error` is not satisfied
   |
   |
LL |     /* *mut $0 is coerced to Box<dyn Error> here */ Box::<_ /* ! */>::new(x)
   |                                                     ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
   = help: the following other types implement trait `std::error::Error`:
             !
             &'a T
             AccessError
---

error[E0277]: the trait bound `(): std::error::Error` is not satisfied
  --> D:\a\rust\rust\src/test\ui\coercion\coerce-issue-49593-box-never.rs:22:49
   |
LL |     /* *mut $0 is coerced to *mut Error here */ raw_ptr_box::<_ /* ! */>(x)
   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
   = help: the following other types implement trait `std::error::Error`:
             !
             &'a T
             AccessError
---
test result: FAILED. 12757 passed; 1 failed; 192 ignored; 0 measured; 0 filtered out; finished in 406.79s

Some tests failed in compiletest suite=ui mode=ui host=i686-pc-windows-msvc target=i686-pc-windows-msvc
Build completed unsuccessfully in 0:32:44
make: *** [Makefile:74: ci-subset-2] Error 1

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