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Bootstrap from 1.28.0 beta
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… since `std` has no corresponding reexports.
Use `alloc::vec::Vec` and `alloc::string::String` instead.
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This matches std::collections
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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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The acronym is not descriptive unless one has seen it before.
* Rename the `oom` function to `handle_alloc_error`. It was **stabilized in 1.28**, so if we do this at all we need to land it this cycle.
* Rename `set_oom_hook` to `set_alloc_error_hook`
* Rename `take_oom_hook` to `take_alloc_error_hook`
Bikeshed: `alloc` v.s. `allocator`, `error` v.s. `failure`
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Stabilize #[repr(transparent)]
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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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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Stabilize GlobalAlloc and #[global_allocator]
This PR implements the changes discussed in https://github.com/rust-lang/rust/issues/49668#issuecomment-393263510
Fixes #49668
Fixes #27389
This does not change the default global allocator: #36963
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Add some docs where they were missing,
attempt to fix them where they were out of date.
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The heap.rs file was already unused.
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[futures] add a few blanket impls to std
these were defined in the futures crate, but with the core definitions moving to std these would need to move too.
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Stabilize Iterator::step_by
Fixes #27741
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Add Future and task system to the standard library
This adds preliminary versions of the `std::future` and `std::task` modules in order to unblock development of async/await (https://github.com/rust-lang/rust/issues/50547). These shouldn't be considered as final forms of these libraries-- design questions about the libraries should be left on https://github.com/rust-lang/rfcs/pull/2418. Once that RFC (or a successor) is merged, these APIs will be adjusted as necessary.
r? @aturon
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Fixes #27741
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Clarify the difference between get_mut and into_mut for OccupiedEntry
The examples for both hash_map::OccupiedEntry::get_mut and
hash_map::OccupiedEntry::into_mut were almost identical. This led to some
confusion over the difference, namely why you would ever use get_mut when
into_mut gives alonger lifetime. Reddit thread:
https://www.reddit.com/r/rust/comments/8a5swr/why_does_hashmaps
This commit adds two lines and a comment to the example, to show that the
entry object can be re-used after calling get_mut.
Closes https://github.com/rust-lang/rust/issues/49745
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impl Default for &mut str
Rationale: There is already `impl Default for &mut [T]`.
Note: This impl is insta-stable.
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Stabilize SliceIndex trait.
CC #35729
According to recommendations in
https://github.com/rust-lang/rust/issues/35729#issuecomment-377784884
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further reduce unsafe fn calls
reduce right drift
assert! sufficient capacity
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old tests cover the new fast path of str joining already
this adds tests for joining into Strings with long separators (>4 byte) and
for joining into Vec<T>, T: Clone + !Copy. Vec<T: Copy> will be
specialised when specialisation type inference bugs are fixed.
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for both Vec<T> and String
- eliminates the boolean first flag in fn join()
for String only
- eliminates repeated bounds checks in join(), concat()
- adds fast paths for small string separators up to a len of 4 bytes
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Fixes #35729
According to recommendations in
https://github.com/rust-lang/rust/issues/35729#issuecomment-377784884
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This avoids an `unsafe` block in each case.
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We only need to implement it for `Any + Send + Sync` because in practice
that's the only useful combination for `Arc` and `Any`.
Implementation for #44608 under the `rc_downcast` feature.
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