Split `fuzzy_provenance_casts` into lossy and fuzzy, feature gate and test it
* split `fuzzy_provenance_casts` into a ptr2int and a int2ptr lint
* feature gate both lints
* update documentation to be more realistic short term
* add tests for these lints
Rollup merge of #95705 - bstrie:x86nonetier, r=Mark-Simulacrum
Promote x86_64-unknown-none target to Tier 2 and distribute build artifacts
This implements https://github.com/rust-lang/compiler-team/issues/499 , in which the compiler team accepted the x86_64-unknown-none target for promotion to a Tier 2 platform.
Rollup merge of #95634 - dtolnay:mailmap, r=Mark-Simulacrum
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```@ncameron.org``` and some from ncameron⁠```@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);
}
}
}
Rollup merge of #95102 - compiler-errors:issue-94034-bug, r=jackh726
Add known-bug for #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.
Auto merge of #95775 - RalfJung:miri-windows-compat, r=ChrisDenton
make windows compat_fn (crudely) work on Miri
With https://github.com/rust-lang/rust/pull/95469, Windows `compat_fn!` now has to be supported by Miri to even make stdout work. Unfortunately, it relies on some outside-of-Rust linker hacks (`#[link_section = ".CRT$XCU"]`) that are rather hard to make work in Miri. So I came up with this crude hack to make this stuff work in Miri regardless. It should come at no cost for regular executions, so I hope this is okay.
Cc https://github.com/rust-lang/rust/issues/95627 `@ChrisDenton`
Auto merge of #95440 - jyn514:error-index, r=Mark-Simulacrum
Fix `x test src/tools/error_index_generator --stage {0,1}`
There were two fixes needed:
1. Use `top_stage` instead of `top_stage - 1`. There was a long and torturous comment about trying to match rustdoc's version, but it works better without the hard-coding than with (before it gave errors that `libtest.so` couldn't be found).
2. Make sure that `ci-llvm/lib` is added to LD_LIBRARY_PATH. Previously the error index would be unable to load LLVM for stage0 builds.
At some point we should probably have a discussion about how rustdoc stages should be numbered;
confusion between 0/1/2 has come up several times in bootstrap now. cc https://github.com/rust-lang/rust/issues/92538
Note that this is still broken when using `download-rustc = true` and `--stage 1`,
but that's *really* a corner case and should affect almost no one. `--stage {0,2}`
work fine with download-rustc.
Auto merge of #95706 - petrochenkov:doclink4, r=GuillaumeGomez
rustdoc: Early doc link resolution fixes and refactorings
A subset of https://github.com/rust-lang/rust/pull/94857 that shouldn't cause perf regressions, but should fix some issues like https://rust-lang.zulipchat.com/#narrow/stream/266220-rustdoc/topic/ICE.20in.20collect_intra_doc_links.2Ers https://github.com/rust-lang/rust/pull/95290 and improve performance in cases like https://github.com/rust-lang/rust/issues/95694.
Rollup merge of #95757 - zofrex:gender-neutral-terms, r=dtolnay
Use gender neutral terms
#95508 was not executed well, but it did find a couple of legitimate issues: some uses of unnecessarily gendered language, and some typos. This PR fixes (properly) the legitimate issues it found.
Rollup merge of #95753 - ChayimFriedman2:patch-1, r=dtolnay
Correct safety reasoning in `str::make_ascii_{lower,upper}case()`
I don't understand why the previous comment was used (it was inserted in #66564), but it doesn't explain why these functions are safe, only why `str::as_bytes{_mut}()` are safe.
If someone thinks they make perfect sense, I'm fine with closing this PR.
Rollup merge of #95189 - fmease:fix-issue-94340, r=estebank
Stop flagging unexpected inner attributes as outer ones in certain diagnostics
Fixes #94340.
In the issue to-be-fixed I write that the general message _an inner attribute is not permitted in this context_ should be more specific noting that the “context” is the `include` macro. This, however, cannot be achieved without touching a lot of things and passing a flag to the `parse_expr` and `parse_item` calls in `expand_include`. This seems rather hacky to me. That's why I left it as it. `Span::from_expansion` does not apply either AFAIK.
Auto merge of #95678 - pietroalbini:pa-1.62.0-bootstrap, r=Mark-Simulacrum
Bump bootstrap compiler to 1.61.0 beta
This PR bumps the bootstrap compiler to the 1.61.0 beta. The first commit changes the stage0 compiler, the second commit applies the "mechanical" changes and the third and fourth commits apply changes explained in the relevant comments.
Auto merge of #95748 - Dylan-DPC:rollup-t208j51, r=Dylan-DPC
Rollup of 5 pull requests
Successful merges:
- #95352 ([bootstrap] Print the full relative path to failed tests)
- #95646 (Mention `std::env::var` in `env!`)
- #95708 (Update documentation for `trim*` and `is_whitespace` to include newlines)
- #95714 (Add test for issue #83474)
- #95725 (Message: Chunks cannot have a size of zero.)
Rollup merge of #95646 - mgeisler:mention-std-env-var, r=Dylan-DPC
Mention `std::env::var` in `env!`
When searching for how to read an environment variable, I first encountered the `env!` macro. It would have been useful to me if the documentation had included a link to `std::env::var`, which is what I was actually looking for.
By heap allocating the argument within `NtPath`, `NtVis`, and `NtStmt`.
This slightly reduces cumulative and peak allocation amounts, most
notably on `deep-vector`.
Auto merge of #95688 - pfmooney:libc-update, r=Mark-Simulacrum
Update libc to 0.2.121
With the updated libc, UNIX stack overflow handling in libstd can now
use the common `si_addr` accessor function, rather than attempting to
use a field from that name in `siginfo_t`. This simplifies the
collection of the fault address, particularly on platforms where that
data resides within a union in `siginfo_t`.
Auto merge of #95745 - Dylan-DPC:rollup-485ajqi, r=Dylan-DPC
Rollup of 5 pull requests
Successful merges:
- #95185 (Stabilize Stdin::lines.)
- #95626 (Don't cast thread name to an integer for prctl)
- #95709 (Improve terse test output.)
- #95735 (Revert "Mark Location::caller() as #[inline]")
- #95738 (Switch item-info from div to span)
Rollup merge of #95735 - bjorn3:revert_inline_location_caller, r=compiler-errors
Revert "Mark Location::caller() as #[inline]"
This reverts https://github.com/rust-lang/rust/pull/95619. As noted in https://github.com/rust-lang/rust/pull/95619#issuecomment-1088548140 this seems to break several tests with cg_clif.
Rollup merge of #95626 - saethlin:pass-pointer-to-prctl, r=cuviper
Don't cast thread name to an integer for prctl
`libc::prctl` and the `prctl` definitions in glibc, musl, and the kernel headers are C variadic functions. Therefore, all the arguments (except for the first) are untyped. It is only the Linux man page which says that `prctl` takes 4 `unsigned long` arguments. I have no idea why it says this.
In any case, the upshot is that we don't need to cast the pointer to an integer and confuse Miri.
But in light of this... what are we doing with those three `0`s? We're passing 3 `i32`s to `prctl`, which doesn't fill me with confidence. The man page says `unsigned long` and all the constants in the linux kernel are macros for expressions of the form `1UL << N`. I'm mostly commenting on this because looks a whole lot like some UB that was found in SQLite a few years ago: <https://youtu.be/LbzbHWdLAI0?t=1925> that was related to accidentally passing a 32-bit value from a literal `0` instead of a pointer-sized value. This happens to work on x86 due to the size of pointers and happens to work on x86_64 due to the calling convention. But also, there is no good reason for an implementation to be looking at those arguments. Some other calls to `prctl` require that other arguments be zeroed, but not `PR_SET_NAME`... so why are we even passing them?
I would prefer to end such questions by either passing 3 `libc::c_ulong`, or not passing those at all, but I'm not sure which is better.
Auto merge of #95742 - Dylan-DPC:rollup-8n7o87y, r=Dylan-DPC
Rollup of 6 pull requests
Successful merges:
- #95342 (Ignore "format the world" commit in git blame)
- #95353 ([bootstrap] Give a hard error when filtering tests for a file that does not exist)
- #95649 (New mir-opt deref_separator)
- #95721 (Fix typo in bootstrap/setup.rs)
- #95730 (Rename RWLock to RwLock in std::sys.)
- #95731 (Check that all hidden types are the same and then deduplicate them.)
Rollup merge of #95731 - oli-obk:lazy_tait_regression, r=compiler-errors
Check that all hidden types are the same and then deduplicate them.
fixes #95538
This used to trigger a sanity check. Now we accept that there may be multiple places where a hidden type is constrained and we merge all of these at the end.
Ideally we'd merge eagerly, but that is a larger refactoring that I don't want to put into a backport
Rollup merge of #95730 - m-ou-se:rwlock-case, r=Dylan-DPC
Rename RWLock to RwLock in std::sys.
std::sync::RwLock is spelled with two capital letters, but std::sys's RWLock was spelled with three capital letters. This cleans that up and uses `RwLock` everywhere.
Rollup merge of #95353 - jyn514:invalid-filter-hard-error, r=Mark-Simulacrum
[bootstrap] Give a hard error when filtering tests for a file that does not exist
A common issue people run into when running compiletest is that filtering for files that don't exist is only a warning and not an error; running the whole test suite instead.
See for example https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/Question.20about.20compiletest.
This is especially bad when using `--bless`, which will modify all `.stderr` files.
Change bootstrap to require valid filters instead of discarding invalid filters and continuing.
Before:
```
Warning: Skipping "/home/jnelson/rust-lang/rust/src/test/rustdoc-ui/intra-doc/feature-gate-intra-doc-pointers.r": not a regular file or directory
Check compiletest suite=rustdoc-ui mode=ui (x86_64-unknown-linux-gnu(x86_64-unknown-linux-gnu) -> x86_64-unknown-linux-gnu(x86_64-unknown-linux-gnu))
running 163 tests
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii.......................... 100/163
...............................................................
test result: ok. 89 passed; 0 failed; 74 ignored; 0 measured; 0 filtered out; finished in 7.20s
finished in 7.248 seconds
Build completed successfully in 0:00:08
```
After:
```
thread 'main' panicked at 'Invalid test suite filter "/home/jnelson/rust-lang/rust/src/test/rustdoc-ui/intra-doc/feature-gate-intra-doc-pointers.r": file or directory does not exist', src/bootstrap/util.rs:311:
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Build completed unsuccessfully in 0:00:08
```
Rollup merge of #95342 - jyn514:ignore-revs, r=Mark-Simulacrum
Ignore "format the world" commit in git blame
This tells github to hide it in its blame view: https://docs.github.com/en/repositories/working-with-files/using-files/viewing-a-file#ignore-commits-in-the-blame-view
It can also be used locally by running `git config blame.ignorerevsfile .git-blame-ignore-revs` (although it's advised to avoid `--global` since git gives a hard error when the file doesn't exist).
We may want to add more commits in later PRs, but this should be a good start.
Before: ![image](https://user-images.githubusercontent.com/23638587/160255130-d7283cc4-4d33-4a7d-bc70-f9ce6820293c.png)
After: ![image](https://user-images.githubusercontent.com/23638587/160255138-90d0325a-e063-4e0e-8cfb-732724bf6c60.png)
cc https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/Hide.20some.20commits.20in.20GitHub.20blame
Martin Geisler [Mon, 4 Apr 2022 14:22:02 +0000 (16:22 +0200)]
Mention `std::env::var` in `env!`
When searching for how to read an environment variable, I first encountered the `env!` macro. It would have been useful to me if the documentation had included a link to `std::env::var`, which is what I was actually looking for.
Auto merge of #95723 - SparrowLii:const_goto, r=fee1-dead
enhance `ConstGoto` mir-opt by moving up `StorageDead` statements
From the `FIXME` in the implementation of `ConstGoto` miropt. We can move `StorageDead` statements up to the predecessor. This can expand the scope of application of this opt.
Auto merge of #95720 - ehuss:update-cargo, r=ehuss
Update cargo
5 commits in 1ef1e0a12723ce9548d7da2b63119de9002bead8..e2e2dddebe66dfc1403a312653557e332445308b
2022-03-31 00:17:18 +0000 to 2022-04-05 17:04:53 +0000
- Part 2 of RFC2906 -- allow inheriting from a different `Cargo.toml` (rust-lang/cargo#10517)
- File Cache is valid if checkout or contents hasn't changed (rust-lang/cargo#10507)
- Fix how scrape-examples handles proc macros (rust-lang/cargo#10533)
- tools: update checkout action on CI (rust-lang/cargo#10521)
- Don't error if no binaries were installed (rust-lang/cargo#10508)
Auto merge of #95711 - Dylan-DPC:rollup-ujss3oi, r=Dylan-DPC
Rollup of 4 pull requests
Successful merges:
- #95659 (Rely on #[link] attribute for unwind on Fuchsia.)
- #95684 (rustdoc: Fix item info display overflow)
- #95693 (interp: pass TyCtxt to Machine methods that do not take InterpCx)
- #95699 (fix: Vec leak when capacity is 0)
Rollup merge of #95699 - SparkyPotato:master, r=dtolnay
fix: Vec leak when capacity is 0
When `RawVec::with_capacity_in` is called with capacity 0, an allocation of size 0 is allocated.
However, `<RawVec as Drop>::drop` doesn't deallocate, since it only checks if capacity was 0. Fixed by not allocating when capacity is 0.
Rollup merge of #95693 - RalfJung:more-context, r=oli-obk
interp: pass TyCtxt to Machine methods that do not take InterpCx
This just seems like something you might need, so let's consistently have it.
One day we might have to add `ParamEnv` as well, though that seems less likely (and in Miri you can always use `reveal_all` anyway). It might make sense to have a type that packages `TyCtxt` and `ParamEnv`, this pairing occurs quite frequently in rustc...
The problem comes from the fact that `span` isn't `display: block` by default. Since `item-info` was already present on `<div>` in other places, I moved the last one to `div` as well.
Auto merge of #95469 - ChrisDenton:unsound-read-write, r=joshtriplett
Fix unsound `File` methods
This is a draft attempt to fix #81357. *EDIT*: this PR now tackles `read()`, `write()`, `read_at()`, `write_at()` and `read_buf`. Still needs more testing though.
cc `@jstarks,` can you confirm the the Windows team is ok with the Rust stdlib using `NtReadFile` and `NtWriteFile`?
~Also, I'm provisionally using `CancelIo` in a last ditch attempt to recover but I'm not sure that this is actually a good idea. Especially as getting into this state would be a programmer error so aborting the process is justified in any case.~ *EDIT*: removed, see comments.
Currently it's called in `parse_tt` every time a match rule is invoked.
This commit moves it so it's called instead once per match rule, in
`compile_declarative_macro. This is a performance win.
The commit also moves `compute_locs` out of `TtParser`, because there's
no longer any reason for it to be in there.
Auto merge of #95702 - Dylan-DPC:rollup-793rz6v, r=Dylan-DPC
Rollup of 8 pull requests
Successful merges:
- #88025 (ScmCredentials netbsd implementation.)
- #95473 (track individual proc-macro expansions in the self-profiler)
- #95547 (caution against ptr-to-int transmutes)
- #95585 (Explain why `&T` is cloned when `T` is not `Clone`)
- #95591 (Use revisions to track NLL test output (part 1))
- #95663 (diagnostics: give a special note for unsafe fn / Fn/FnOnce/FnMut)
- #95673 (:arrow_up: rust-analyzer)
- #95681 (resolve: Fix resolution of empty paths passed from rustdoc)
Rollup merge of #95591 - jackh726:nll-revisions-1, r=oli-obk
Use revisions to track NLL test output (part 1)
The idea here is 2 fold: 1) When we eventually do make NLL default on, that PR should be systematic in "delete revisions and corresponding error annotations" 2) This allows us to look at test NLL outputs in chunks. (Though, I've opted here not to "mark" these tests. There are some tests with NLL revisions *now* that will be missed. I expect we do a second pass once we have all the tests with NLL revisions; these tests should be easy enough to eyeball.)
The actual review here should be "easy", but a bit tedious. I expect we should manually go through each test output and confirm it's okay.
The majority of these are either: 1) Only span change (the one I see most common is highlighting an entire function call, rather than just the function name in that call) 2) "E0308 mismatched types" -> "lifetime does not live long enough" 3) "E0495 cannot infer an appropriate lifetime for lifetime parameter" -> "lifetime does not live long enough" 4) "E0312 lifetime of reference outlives lifetime of borrowed content" -> "lifetime does not live long enough" 5) "E0759 `XXX` has an anonymous lifetime `'_` but it needs to satisfy a `'static` lifetime requirement" -> "lifetime does not live long enough" 6) "E0623 lifetime mismatch" -> "lifetime does not live long enough"
Other than the now lack of an error code, most of these look fine (with most giving more helpful suggestions now).
`rfc1623` output isn't great.
cc ``@marmeladema`` if you want to look through these
Let's r? ``@oli-obk`` since you've commented on the Zulip thread ;)
Rollup merge of #95547 - RalfJung:ptr-int-transmutes, r=scottmcm
caution against ptr-to-int transmutes
I don't know how strong of a statement we want to make here, but I am very concerned that the current docs could be interpreted as saying that ptr-to-int transmutes are just as okay as transmuting `*mut T` into an `&mut T`.
Examples [like this](https://github.com/rust-lang/unsafe-code-guidelines/issues/286#issuecomment-1085144431) show that ptr-to-int transmutes are deeply suspicious -- they are either UB, or they don't round-trip properly, or we have to basically say that `transmute` will actively look for pointers and do all the things a ptr-to-int cast does (which includes a global side-effect of marking the pointed-to allocation as 'exposed').
Another alternative might be to simply not talk about them... but we *do* want people to use casts rather than transmutes for this.
Rollup merge of #95473 - lqd:macro-expansion, r=petrochenkov
track individual proc-macro expansions in the self-profiler
As described in [this zulip thread](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Macro.20expansion.20performance.20on.20complex.20macros/near/275063190), users don't currently have a lot of information to diagnose macro expansion performance issues. That comment suggests using the macro names to add further timing information.
This PR starts to do this for proc-macros which have the same issue, and performance problems happening in the wild in [this other zulip thread](https://rust-lang.zulipchat.com/#narrow/stream/247081-t-compiler.2Fperformance/topic/Identifying.20proc-macro.20slowdowns) could be helped by such information.
It uses the available proc-macro name to track their individual expansions with self-profiling events.
r? `@Aaron1011` who mentioned this idea originally