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Rollup of 6 pull requests #95792

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@rustbot modify labels: rollup

Create a similar rollup

compiler-errors and others added 12 commits March 23, 2022 22:17
…jackh726

Add known-bug for rust-lang#95034

Couldn't fix the issue, since I am no type theorist and inference variables in universes above U0 scare me. But I at least wanted to add a known-bug test for it.

cc rust-lang#95034 (does not fix)
Mailmap update

I noticed there are a lot of contributors who appear multiple times in https://thanks.rust-lang.org/rust/all-time/, which makes their "rank" on that page inaccurate. For example Nick Cameron currently appears at rank 21 with 2010 contributions and at rank 27 with 1287 contributions, because some of those are from nrc&rust-lang#8288;``@ncameron.org`` and some from ncameron&rust-lang#8288;``@mozilla.com.`` In reality Nick's rank would be 11 if counted correctly, which is a large difference.

Solving this in a totally automated way is tricky because it involves figuring out whether Nick is 1 person with multiple emails, or is 2 people sharing the same name.

This PR addresses a subset of the cases: only where a person has committed under multiple names using the same email. This is still not something that can be totally automated (e.g. by modifying https://github.com/rust-lang/thanks to dedup by email instead of name+email) because:

- Some emails are not necessarily unique to one contributor, such as `ubuntu@localhost`.

- It involves some judgement and mindfulness in picking the "canonical name" among the names used with a particular email. This is the name that will appear on thanks.rust-lang.org. Humans change their names sometimes and can be sensitive or picky about the use of names that are no longer preferred.

For the purpose of this PR, I've tried to stick to the following heuristics which should be unobjectionable:

- If one of the names is currently set as the display name on the contributor's GitHub profile, prefer that name.

- If one of the names is used exclusively over the others in chronologically newer pull requests, prefer the newest name.

- If one of the names has whitespace and the other doesn't (i.e. is username-like), such as `Foo Bar` vs `FooBar` or `foobar` or `foo-bar123`, but otherwise closely resemble one another, then prefer the human-like name.

- If none of the above suffice in determining a canonical name and the contributor has some other name set on their GitHub profile, use the name from the GitHub profile.

- If no name on their GitHub profile but the profile links to their personal website which unambiguously identifies their preferred name, then use that name.

I'm also thinking about how to handle cases like Nick's, but that will be a project for a different PR. Basically I'd like to be able to find cases of the same person making commits that differ in name *and* email by looking at all the commits present in pull requests opened by the same GitHub user.

<details>
<summary>script</summary>

```toml
[dependencies]
anyhow = "1.0"
git2 = "0.14"
mailmap = "0.1"
```
```rust
use anyhow::{bail, Context, Result};
use git2::{Commit, Oid, Repository};
use mailmap::{Author, Mailmap};
use std::collections::{BTreeMap as Map, BTreeSet as Set};
use std::fmt::{self, Debug};
use std::fs;
use std::path::Path;

const REPO: &str = "/git/rust";

fn main() -> Result<()> {
    let repo = Repository::open(REPO)?;
    let head_oid = repo
        .head()?
        .target()
        .context("expected head to be a direct reference")?;
    let head = repo.find_commit(head_oid)?;

    let mailmap_path = Path::new(REPO).join(".mailmap");
    let mailmap_contents = fs::read_to_string(mailmap_path)?;
    let mailmap = match Mailmap::from_string(mailmap_contents) {
        Ok(mailmap) => mailmap,
        Err(box_error) => bail!("{}", box_error),
    };

    let mut history = Set::new();
    let mut merges = Vec::new();
    let mut authors = Set::new();
    let mut emails = Map::new();
    let mut all_authors = Set::new();
    traverse_left(head, &mut history, &mut merges, &mut authors, &mailmap)?;
    while let Some((commit, i)) = merges.pop() {
        let right = commit.parents().nth(i).unwrap();
        authors.clear();
        traverse_left(right, &mut history, &mut merges, &mut authors, &mailmap)?;
        for author in &authors {
            all_authors.insert(author.clone());
            if !author.email.is_empty() {
                emails
                    .entry(author.email.clone())
                    .or_insert_with(Map::new)
                    .entry(author.name.clone())
                    .or_insert_with(Set::new);
            }
        }
        if let Some(summary) = commit.summary() {
            if let Some(pr) = parse_summary(summary)? {
                for author in &authors {
                    if !author.email.is_empty() {
                        emails
                            .get_mut(&author.email)
                            .unwrap()
                            .get_mut(&author.name)
                            .unwrap()
                            .insert(pr);
                    }
                }
            }
        }
    }

    for (email, names) in emails {
        if names.len() > 1 {
            println!("<{}>", email);
            for (name, prs) in names {
                let prs = DebugSet(prs.iter().rev());
                println!("    {} {:?}", name, prs);
            }
        }
    }

    eprintln!("{} commits", history.len());
    eprintln!("{} authors", all_authors.len());
    Ok(())
}

fn traverse_left<'repo>(
    mut commit: Commit<'repo>,
    history: &mut Set<Oid>,
    merges: &mut Vec<(Commit<'repo>, usize)>,
    authors: &mut Set<Author>,
    mailmap: &Mailmap,
) -> Result<()> {
    loop {
        let oid = commit.id();
        if !history.insert(oid) {
            return Ok(());
        }
        let author = author(mailmap, &commit);
        let is_bors = author.name == "bors" && author.email == "bors@rust-lang.org";
        if !is_bors {
            authors.insert(author);
        }
        let mut parents = commit.parents();
        let parent = match parents.next() {
            Some(parent) => parent,
            None => return Ok(()),
        };
        for i in 1..1 + parents.len() {
            merges.push((commit.clone(), i));
        }
        commit = parent;
    }
}

fn parse_summary(summary: &str) -> Result<Option<PullRequest>> {
    let mut rest = None;
    for prefix in [
        "Auto merge of #",
        "Merge pull request #",
        " Manual merge of #",
        "auto merge of #",
        "auto merge of pull req #",
        "rollup merge of #",
        "Rollup merge of #",
        "Rollup merge of  #",
        "Rollup merge of ",
        "Merge PR #",
        "Merge #",
        "Merged #",
    ] {
        if summary.starts_with(prefix) {
            rest = Some(&summary[prefix.len()..]);
            break;
        }
    }
    let rest = match rest {
        Some(rest) => rest,
        None => return Ok(None),
    };
    let end = rest.find([' ', ':']).unwrap_or(rest.len());
    let number = match rest[..end].parse::<u32>() {
        Ok(number) => number,
        Err(err) => {
            eprintln!("{}", summary);
            bail!(err);
        }
    };
    Ok(Some(PullRequest(number)))
}

fn author(mailmap: &Mailmap, commit: &Commit) -> Author {
    let signature = commit.author();
    let name = String::from_utf8_lossy(signature.name_bytes()).into_owned();
    let email = String::from_utf8_lossy(signature.email_bytes()).into_owned();
    mailmap.canonicalize(&Author { name, email })
}

#[derive(Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
struct PullRequest(u32);

impl Debug for PullRequest {
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        write!(formatter, "#{}", self.0)
    }
}

struct DebugSet<T>(T);

impl<T> Debug for DebugSet<T>
where
    T: Iterator + Clone,
    T::Item: Debug,
{
    fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        formatter.debug_set().entries(self.0.clone()).finish()
    }
}
```
</details>
Promote x86_64-unknown-none target to Tier 2 and distribute build artifacts

This implements rust-lang/compiler-team#499 , in which the compiler team accepted the x86_64-unknown-none target for promotion to a Tier 2 platform.
Don't report numeric inference ambiguity when we have previous errors

Fixes rust-lang#95648
…nkov

Kickstart the inner usage of `macro_metavar_expr`

There can be more use-cases but I am out of ideas.

cc rust-lang#83527
r? `@petrochenkov`
[macro_metavar_expr] Add tests to ensure the feature requirement

These tests should have been added in the initial implementation they were unintentionally forgotten

cc rust-lang#83527
r? `@petrochenkov`
@rustbot rustbot added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. rollup A PR which is a rollup labels Apr 8, 2022
@Dylan-DPC
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@bors r+ rollup=never p=5

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bors commented Apr 8, 2022

📌 Commit cfa8483 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 8, 2022
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bors commented Apr 8, 2022

⌛ Testing commit cfa8483 with merge 6faf6973b5b2750c7759307ce823b81b496e5bf1...

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bors commented Apr 8, 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 8, 2022
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The job x86_64-msvc-1 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)
---- [ui] src/test\ui-fulldeps\stdio-from.rs stdout ----

error: test run failed!
status: exit code: 101
command: PATH="D:\a\rust\rust\build\x86_64-pc-windows-msvc\stage2\lib\rustlib\x86_64-pc-windows-msvc\lib;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\x64;D:\a\rust\rust\build\x86_64-pc-windows-msvc\stage0-bootstrap-tools\x86_64-pc-windows-msvc\release\deps;D:\a\rust\rust\build\x86_64-pc-windows-msvc\stage0\bin;D:\a\rust\rust\ninja;D:\a\rust\rust\msys2\mingw64\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\1.15.15\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\\x86_64-pc-windows-msvc\\test\\ui-fulldeps\\stdio-from\\a.exe"
stdout: none
--- stderr -------------------------------
I/O error: operation failed to complete synchronously
thread 'main' panicked at 'assertion failed: child2.wait()?.success()', D:\a\rust\rust\src/test\ui-fulldeps\stdio-from.rs:50:5
------------------------------------------




failures:
    [ui] src/test\ui-fulldeps\stdio-from.rs

test result: FAILED. 65 passed; 1 failed; 1 ignored; 0 measured; 0 filtered out; finished in 19.68s

Some tests failed in compiletest suite=ui-fulldeps mode=ui host=x86_64-pc-windows-msvc target=x86_64-pc-windows-msvc
Build completed unsuccessfully in 0:27:23
make: *** [Makefile:72: ci-subset-1] Error 1

@Dylan-DPC Dylan-DPC closed this Apr 8, 2022
@Dylan-DPC Dylan-DPC deleted the rollup-h3dztpu branch April 8, 2022 09:48
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