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r=petrochenkov
Support future deprecation for rustc_deprecated
Follow-up to #49179 to allow `since` parameters to be set to future versions of Rust and correspondingly to not be treated as deprecated until that version. This is required for #30459 to be completed (though we'll need to wait until this hits beta).
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Various changes to existing diagnostics
* [Add code to `invalid ABI` error, add span label, move list to help to make message shorter](https://github.com/rust-lang/rust/pull/51463/commits/23ae5af274defa9ff884f593e44a2bbcaf814a02):
```
error[E0697]: invalid ABI: found `路濫狼á́́`
--> $DIR/unicode.rs:11:8
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LL | extern "路濫狼á́́" fn foo() {} //~ ERROR invalid ABI
| ^^^^^^^^^ invalid ABI
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= help: valid ABIs: cdecl, stdcall, fastcall, vectorcall, thiscall, aapcs, win64, sysv64, ptx-kernel, msp430-interrupt, x86-interrupt, Rust, C, system, rust-intrinsic, rust-call, platform-intrinsic, unadjusted
```
* [Add code to incorrect `pub` restriction error](https://github.com/rust-lang/rust/pull/51463/commits/e96fdea8a38f39f99f8b9a4000a689187a457e08)
* [Add message to `rustc_on_unimplemented` attributes in core to have them set a custom message _and_ label](https://github.com/rust-lang/rust/pull/51463/commits/2cc7e5ed307aee936c20479cfdc7409d6b52a464):
```
error[E0277]: `W` does not have a constant size known at compile-time
--> $DIR/unsized-enum2.rs:33:8
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LL | VA(W),
| ^ `W` does not have a constant size known at compile-time
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= help: the trait `std::marker::Sized` is not implemented for `W`
= help: consider adding a `where W: std::marker::Sized` bound
= note: no field of an enum variant may have a dynamically sized type
```
```
error[E0277]: `Foo` cannot be sent between threads safely
--> $DIR/E0277-2.rs:26:5
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LL | is_send::<Foo>();
| ^^^^^^^^^^^^^^ `Foo` cannot be sent between threads safely
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= help: the trait `std::marker::Send` is not implemented for `Foo`
```
```
error[E0277]: can't compare `{integer}` with `std::string::String`
--> $DIR/binops.rs:16:7
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LL | 5 < String::new();
| ^ no implementation for `{integer} < std::string::String` and `{integer} > std::string::String`
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= help: the trait `std::cmp::PartialOrd<std::string::String>` is not implemented for `{integer}`
```
```
error[E0277]: can't compare `{integer}` with `std::result::Result<{integer}, _>`
--> $DIR/binops.rs:17:7
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LL | 6 == Ok(1);
| ^^ no implementation for `{integer} == std::result::Result<{integer}, _>`
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= help: the trait `std::cmp::PartialEq<std::result::Result<{integer}, _>>` is not implemented for `{integer}`
```
```
error[E0277]: a collection of type `i32` cannot be built from an iterator over elements of type `i32`
--> $DIR/type-check-defaults.rs:16:19
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LL | struct WellFormed<Z = Foo<i32, i32>>(Z);
| ^ a collection of type `i32` cannot be built from `std::iter::Iterator<Item=i32>`
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= help: the trait `std::iter::FromIterator<i32>` is not implemented for `i32`
note: required by `Foo`
--> $DIR/type-check-defaults.rs:15:1
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LL | struct Foo<T, U: FromIterator<T>>(T, U);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
* [Add link to book for `Sized` errors](https://github.com/rust-lang/rust/pull/51463/commits/1244dc7c283323aea1a3457a4458d590a3e160c8):
```
error[E0277]: `std::fmt::Debug + std::marker::Sync + 'static` does not have a constant size known at compile-time
--> $DIR/const-unsized.rs:13:29
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LL | const CONST_0: Debug+Sync = *(&0 as &(Debug+Sync));
| ^^^^^^^^^^^^^^^^^^^^^^ `std::fmt::Debug + std::marker::Sync + 'static` does not have a constant size known at compile-time
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= help: the trait `std::marker::Sized` is not implemented for `std::fmt::Debug + std::marker::Sync + 'static`
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types--sized>
= note: constant expressions must have a statically known size
```
* [Point to previous line for single expected token not found](https://github.com/rust-lang/rust/pull/51463/commits/48165168fb0f059d8536cd4a2276b609d4a7f721) (if the current token is in a different line)
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Tracking issue FCP: https://github.com/rust-lang/rust/issues/43036#issuecomment-394094318
Reference PR: https://github.com/rust-lang-nursery/reference/pull/353
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Enable fall through past $:lifetime matcher
```rust
macro_rules! is_lifetime {
($lifetime:lifetime) => { true };
($other:tt) => { false };
}
fn main() {
println!("{}", is_lifetime!('lifetime));
println!("{}", is_lifetime!(@));
}
```
Before this fix, the `is_lifetime!` invocation would fail to compile with:
```
error: expected a lifetime, found `@`
--> src/main.rs:8:33
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8 | println!("{}", is_lifetime!(@));
| ^
```
Fixes #50903.
Fixes #51477.
r? @kennytm
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Warn on `repr` without hints
Fix #51376.
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Stabilize unit tests with non-`()` return type
References #48854
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Fix Issue 38777
When looking through for a closing bracket in the loop condition, adds them to expecteds.
https://github.com/rust-lang/rust/issues/38777
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Fix the use of closures within #[panic_implementation]
Fixes #51365.
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test: Ignore some problematic tests on sparc and sparc64
This updates the list of tests which can be safely ignored on sparc and sparc64.
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Make anon params lint warn-by-default
This is intended as a followup on anonymous parameters deprecation.
Cross-posting from #41686:
> After having read a bit more of the discussion that I can find, I propose a more aggressive deprecation strategy:
> - We make the lint warn-by-default as soon as possible
> - We make anon parameters a hard error at the epoch boundary
cc @matklad @est31 @aturon
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Issue #51022: Improve E0131 message when lifetimes are involved.
Fixes #51022
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Fail typecheck if we encounter a bogus break
Lone breaks outside of loops create errors in the
loop check pass but as they are not fatal,
compilation continues.
MIR building code assumes all HIR break statements
to point to valid locations and fires ICEs if this
assumption is violated. In normal compilation,
this causes no issues, as code apparently prevents
MIR from being built if errors are present.
However, before that, typecheck runs and with it
MIR const eval. Here we operate differently
from normal compilation: it doesn't check for any
errors except for type checker ones and then
directly builds the MIR.
This constellation causes an ICE-on-error if
bogus break statements are being put into array
length expressions.
This commit fixes this ICE by letting typecheck
fail if bogus break statements are encountered.
This way, MIR const eval fails cleanly with a
type check error.
Fixes #50576
Fixes #50581
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Lone breaks outside of loops create errors in the
loop check pass but as they are not fatal,
compilation continues.
MIR building code assumes all HIR break statements
to point to valid locations and fires ICEs if this
assumption is violated. In normal compilation,
this causes no issues, as code apparently prevents
MIR from being built if errors are present.
However, before that, typecheck runs and with it
MIR const eval. Here we operate differently
from normal compilation: it doesn't check for any
errors except for type checker ones and then
directly builds the MIR.
This constellation causes an ICE-on-error if
bogus break statements are being put into array
length expressions.
This commit fixes this ICE by letting typecheck
fail if bogus break statements are encountered.
This way, MIR const eval fails cleanly with a
type check error.
Fixes #50576
Fixes #50581
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2093 infer outlives requirements
Tracking issue: #44493
RFC: https://github.com/rust-lang/rfcs/pull/2093
- [x] add `rustc_attrs` flag
- [x] use `RequirePredicates` type
- [x] handle explicit predicates on `dyn` Trait
- [x] handle explicit predicates on projections
- [x] more tests
- [x] remove `unused`, `dead_code` and etc..
- [x] documentation
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Add tests, documentation and attr for feature.
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Tweak `main` type arguments and where clause spans
Tweak the spans for error when finding type arguments or where clauses
in main and start functions.
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