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Remove `LangItems::require`
It's just a short wrapper used by `tcx.require_lang_item`. Deleting it gives us a negative diff.
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It's just a short wrapper used by `tcx.require_lang_item`. Deleting it
gives us a negative diff.
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Rollup of 10 pull requests
Successful merges:
- #111428 (refactor(resolve): clean up the early error return caused by non-call)
- #111449 (Recover `impl<T ?Sized>` correctly)
- #111572 (Document that `missing_copy_implementations` and `missing_debug_implementations` only apply to public items.)
- #111602 (Suppress "erroneous constant used" for constants tainted by errors)
- #111605 (fixup version placeholder for `cfi_encoding` feature)
- #111607 (Add clubby789 to the bootstrap review rotation)
- #111614 (Add more interesting nonsense to weird-exprs.rs)
- #111617 (Fixed typo)
- #111620 (Add eholk back to compiler-contributors reviewers)
- #111621 (Fix release date of 1.58.1 in release notes.)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Suppress "erroneous constant used" for constants tainted by errors
When constant evaluation fails because its MIR is tainted by errors,
suppress note indicating that erroneous constant was used, since those
errors have to be fixed regardless of the constant being used or not.
Fixes #110891.
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When constant evaluation fails because its MIR is tainted by errors,
suppress note indicating that erroneous constant was used, since those
errors have to be fixed regardless of the constant being used or not.
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r=compiler-errors
Get current target config from` --print=cfg`
Compiletest was switched to querying all targets using `--print=all-target-specs-json` and `--print=target-spec-json` in #108905. This unintentionally prevented codegen flags like `-Cpanic` from being reflected in the current target configuration. This change gets the current compiletest target config using `--print=cfg` like it was previously while still using the faster prints for getting information on all other targets.
Fixes #110850.
`@jyn514` might be interested in reviewing since they commented on the issue.
cc `@tmandry` since this issue is affecting Fuchsia.
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Compiletest was switched to querying all targets using
`--print=all-target-specs-json` and `--print=target-spec-json`
in #108905. This unintentionally prevented codegen flags like `-Cpanic`
from being reflected in the current target configuration. This change
gets the current compiletest target config using `--print=cfg` like it
was previously while still using the faster prints for getting
information on all other targets.
Fixes #110850.
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Move expansion of query macros in rustc_middle to rustc_middle::query
This moves the expansion of `define_callbacks!` and `define_feedable!` from `rustc_middle::ty::query` to `rustc_middle::query`.
This means that types used in queries are both imported and used in `rustc_middle::query` instead of being split between these modules. It also decouples `rustc_middle::ty::query` further from `rustc_middle` which is helpful since we want to move `rustc_middle::ty::query` to the query system crates.
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A warning about an unnecessary drop used to appear when running the
linkchecker. Also some clippy warnings
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Shorten lifetime of panic temporaries in panic_fmt case
This fixes an issue called out by `@fasterthanlime` in https://octodon.social/`@fasterthanlime/109304454114856561.` Macros like `todo!("…")` and `panic!("…", …)` drop their `format_args` temporary at the nearest enclosing semicolon **outside** the macro invocation, not inside the macro invocation. Due to the formatting internals being type-erased in a way that is not thread-safe, this blocks futures from being `Send` if there is an `await` anywhere between the panic call and the nearest enclosing semicolon.
**Example:**
```rust
#![allow(unreachable_code)]
async fn f(_: u8) {}
async fn g() {
f(todo!("...")).await;
}
fn require_send(_: impl Send) {}
fn main() {
require_send(g());
}
```
**Before:**
```console
error: future cannot be sent between threads safely
--> src/main.rs:15:18
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15 | require_send(g());
| ^^^ future returned by `g` is not `Send`
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= help: the trait `Sync` is not implemented for `core::fmt::Opaque`
note: future is not `Send` as this value is used across an await
--> src/main.rs:9:20
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9 | f(todo!("...")).await;
| ------------ ^^^^^^ await occurs here, with `$crate::format_args!($($arg)+)` maybe used later
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| has type `ArgumentV1<'_>` which is not `Send`
note: `$crate::format_args!($($arg)+)` is later dropped here
--> src/main.rs:9:26
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9 | f(todo!("...")).await;
| ^
note: required by a bound in `require_send`
--> src/main.rs:12:25
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12 | fn require_send(_: impl Send) {}
| ^^^^ required by this bound in `require_send`
```
**After:** works.
Arguably there is a rustc fix that could work here too, instead of a standard library change. Rustc could be taught that the code shown above is fine to compile because the `await` is unreachable and so temporaries before the `await` do not need to get put in the anonymous compiler-generated `Future` struct, regardless of syntactically where they're supposed to be dropped according to the language semantics.
I would be open to that, though my recollection is that in the past we have been very hesitant about introducing any smarts into Drop placement. People want the language rules about where temporaries are dropped to be as simplistic and predictable as possible.
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Use dynamic dispatch for queries
This replaces most concrete query values `V` with `MaybeUninit<[u8; { size_of::<V>() }]>` reducing the code instantiated by queries. The compile time of `rustc_query_impl` is reduced by 27%. It is an alternative to https://github.com/rust-lang/rust/pull/107937 which uses unstable const generics while this uses a `EraseType` trait which maps query values to their erased variant.
This is achieved by introducing an `Erased` type which does sanity check with `cfg(debug_assertions)`. The query caches gets instantiated with these erased types leaving the code in `rustc_query_system` unaware of them. `rustc_query_system` is changed to use instances of `QueryConfig` so that `rustc_query_impl` can pass in `DynamicConfig` which holds a pointer to a virtual table.
<table><tr><td rowspan="2">Benchmark</td><td colspan="1"><b>Before</b></th><td colspan="2"><b>After</b></th></tr><tr><td align="right">Time</td><td align="right">Time</td><td align="right">%</th></tr><tr><td>🟣 <b>clap</b>:check</td><td align="right">1.7055s</td><td align="right">1.6949s</td><td align="right"> -0.62%</td></tr><tr><td>🟣 <b>hyper</b>:check</td><td align="right">0.2547s</td><td align="right">0.2528s</td><td align="right"> -0.73%</td></tr><tr><td>🟣 <b>regex</b>:check</td><td align="right">0.9590s</td><td align="right">0.9553s</td><td align="right"> -0.39%</td></tr><tr><td>🟣 <b>syn</b>:check</td><td align="right">1.5457s</td><td align="right">1.5440s</td><td align="right"> -0.11%</td></tr><tr><td>🟣 <b>syntex_syntax</b>:check</td><td align="right">5.9092s</td><td align="right">5.9009s</td><td align="right"> -0.14%</td></tr><tr><td>Total</td><td align="right">10.3741s</td><td align="right">10.3479s</td><td align="right"> -0.25%</td></tr><tr><td>Summary</td><td align="right">1.0000s</td><td align="right">0.9960s</td><td align="right"> -0.40%</td></tr></table>
<table><tr><td rowspan="2">Benchmark</td><td colspan="1"><b>Before</b></th><td colspan="2"><b>After</b></th></tr><tr><td align="right">Time</td><td align="right">Time</td><td align="right">%</th></tr><tr><td>🟣 <b>clap</b>:check:initial</td><td align="right">2.0605s</td><td align="right">2.0575s</td><td align="right"> -0.15%</td></tr><tr><td>🟣 <b>hyper</b>:check:initial</td><td align="right">0.3218s</td><td align="right">0.3216s</td><td align="right"> -0.07%</td></tr><tr><td>🟣 <b>regex</b>:check:initial</td><td align="right">1.1848s</td><td align="right">1.1839s</td><td align="right"> -0.07%</td></tr><tr><td>🟣 <b>syn</b>:check:initial</td><td align="right">1.9409s</td><td align="right">1.9376s</td><td align="right"> -0.17%</td></tr><tr><td>🟣 <b>syntex_syntax</b>:check:initial</td><td align="right">7.3105s</td><td align="right">7.2928s</td><td align="right"> -0.24%</td></tr><tr><td>Total</td><td align="right">12.8185s</td><td align="right">12.7935s</td><td align="right"> -0.20%</td></tr><tr><td>Summary</td><td align="right">1.0000s</td><td align="right">0.9986s</td><td align="right"> -0.14%</td></tr></table>
<table><tr><td rowspan="2">Benchmark</td><td colspan="1"><b>Before</b></th><td colspan="2"><b>After</b></th></tr><tr><td align="right">Time</td><td align="right">Time</td><td align="right">%</th></tr><tr><td>🟣 <b>clap</b>:check:unchanged</td><td align="right">0.4606s</td><td align="right">0.4617s</td><td align="right"> 0.24%</td></tr><tr><td>🟣 <b>hyper</b>:check:unchanged</td><td align="right">0.1335s</td><td align="right">0.1336s</td><td align="right"> 0.08%</td></tr><tr><td>🟣 <b>regex</b>:check:unchanged</td><td align="right">0.3324s</td><td align="right">0.3346s</td><td align="right"> 0.65%</td></tr><tr><td>🟣 <b>syn</b>:check:unchanged</td><td align="right">0.6268s</td><td align="right">0.6307s</td><td align="right"> 0.64%</td></tr><tr><td>🟣 <b>syntex_syntax</b>:check:unchanged</td><td align="right">1.8248s</td><td align="right">1.8508s</td><td align="right">💔 1.43%</td></tr><tr><td>Total</td><td align="right">3.3779s</td><td align="right">3.4113s</td><td align="right"> 0.99%</td></tr><tr><td>Summary</td><td align="right">1.0000s</td><td align="right">1.0061s</td><td align="right"> 0.61%</td></tr></table>
It's based on https://github.com/rust-lang/rust/pull/108167.
r? `@cjgillot`
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Generate shell completions for bootstrap with Clap
Now that #110693 has been merged, we can look at generating shell completions for x.py with `clap_complete`. Leaving this as draft for now as I'm not sure of the best way to integration the completion generator. Additionally, the generated completions for zsh are completely broken (will need to be resolved upstream, it doesn't seem to handle subcommands + global arguments well).
I don't have Fish installed and would be interested to know how well completions work there.
Alternative to #107827
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Add a tidy check to find unexpected files in UI tests, and clean up the results
While looking at UI tests, I noticed several weird files that were not being tested, some from even pre-1.0. I added a tidy check that fails if any files not known to compiletest or not used in tests (via manual list) are present in the ui tests.
Unfortunately the root entry limit had to be raised by 1 to accommodate the stderr file for one of the tests.
r? `@fee1-dead`
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update Miri
and run mir-opt-level=4 tests in rustc CI so issues like https://github.com/rust-lang/rust/issues/111422 are caught before they land.
r? `@oli-obk` due to the bootstrap changes
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Uplift `clippy::{drop,forget}_{ref,copy}` lints
This PR aims at uplifting the `clippy::drop_ref`, `clippy::drop_copy`, `clippy::forget_ref` and `clippy::forget_copy` lints.
Those lints are/were declared in the correctness category of clippy because they lint on useless and most probably is not what the developer wanted.
## `drop_ref` and `forget_ref`
The `drop_ref` and `forget_ref` lint checks for calls to `std::mem::drop` or `std::mem::forget` with a reference instead of an owned value.
### Example
```rust
let mut lock_guard = mutex.lock();
std::mem::drop(&lock_guard) // Should have been drop(lock_guard), mutex
// still locked
operation_that_requires_mutex_to_be_unlocked();
```
### Explanation
Calling `drop` or `forget` on a reference will only drop the reference itself, which is a no-op. It will not call the `drop` or `forget` method on the underlying referenced value, which is likely what was intended.
## `drop_copy` and `forget_copy`
The `drop_copy` and `forget_copy` lint checks for calls to `std::mem::forget` or `std::mem::drop` with a value that derives the Copy trait.
### Example
```rust
let x: i32 = 42; // i32 implements Copy
std::mem::forget(x) // A copy of x is passed to the function, leaving the
// original unaffected
```
### Explanation
Calling `std::mem::forget` [does nothing for types that implement Copy](https://doc.rust-lang.org/std/mem/fn.drop.html) since the value will be copied and moved into the function on invocation.
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Followed the instructions for uplift a clippy describe here: https://github.com/rust-lang/rust/pull/99696#pullrequestreview-1134072751
cc `@m-ou-se` (as T-libs-api leader because the uplifting was discussed in a recent meeting)
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Add `./miri run-dep` for running a file with test dependencies available
fixes #2443
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Rollup of 6 pull requests
Successful merges:
- #111179 (Fix instrument-coverage tests by using Python to sort instantiation groups)
- #111393 (bump windows crate 0.46 -> 0.48)
- #111441 (Verify copies of mutable pointers in 2 stages in ReferencePropagation)
- #111456 (Update cargo)
- #111490 (Don't ICE in layout computation for placeholder types)
- #111492 (use by ref TokenTree iterator to avoid a few clones)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Update cargo
2 commits in 26b73d15a68fb94579f6d3590585ec0e9d81d3d5..13413c64ff88dd6c2824e9eb9374fc5f10895d28
2023-05-09 20:28:03 +0000 to 2023-05-10 13:46:18 +0000
* Update libc to 0.2.144 (rust-lang/cargo#12098)
* changelog: add entries of some behavior changes (rust-lang/cargo#12119)
r? ``````@weihanglo``````
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bump windows crate 0.46 -> 0.48
This drops duped version of crate(0.46), reduces `rustc_driver.dll` ~800kb and reduces exported functions number from 26k to 22k.
Also while here, added `tidy-alphabetical` sorting to lists in tidy allowed lists.
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Rollup of 7 pull requests
Successful merges:
- #106038 (use implied bounds when checking opaque types)
- #111366 (Make `NonUseContext::AscribeUserTy` carry `ty::Variance`)
- #111375 (CFI: Fix SIGILL reached via trait objects)
- #111439 (Fix backtrace normalization in ice-bug-report-url.rs)
- #111444 (Only warn single-use lifetime when the binders match.)
- #111459 (Update browser-ui-test version to 0.16.0)
- #111460 (Improve suggestion for `self: Box<self>`)
Failed merges:
- #110454 (Require impl Trait in associated types to appear in method signatures)
r? `@ghost`
`@rustbot` modify labels: rollup
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Update browser-ui-test version to 0.16.0
This new version brings one major improvement: it allows to use the original color format in checks (I plan to slowly continue converting colors back to their "original" format, ie the one used in CSS).
It also provides some improvements in some commands API.
r? `````@notriddle`````
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