rust/src/liballoc, branch 1.45.2

Rollup merge of #72499 - mendess:master, r=dtolnay

2020-05-30T11:45:06+00:00

Override Box::<[T]>::clone_from Avoid dropping and reallocating when cloning to an existing box if the lengths are the same. It would be nice if this could also be specialized for `Copy` but I don't know how that works since it's not on stable. Will gladly look into it if it's deemed as a good idea. This is my first PR with code, hope I did everything right :smile:

Rollup merge of #72162 - cuviper:extend_one, r=Mark-Simulacrum

2020-05-30T03:39:10+00:00

Add Extend::{extend_one,extend_reserve} This adds new optional methods on `Extend`: `extend_one` add a single element to the collection, and `extend_reserve` pre-allocates space for the predicted number of incoming elements. These are used in `Iterator` for `partition` and `unzip` as they shuffle elements one-at-a-time into their respective collections.

Add Extend::{extend_one,extend_reserve}

2020-05-30T00:05:17+00:00

This adds new optional methods on `Extend`: `extend_one` add a single element to the collection, and `extend_reserve` pre-allocates space for the predicted number of incoming elements. These are used in `Iterator` for `partition` and `unzip` as they shuffle elements one-at-a-time into their respective collections.

Auto merge of #72756 - RalfJung:rollup-tbjmtx2, r=RalfJung

2020-05-29T23:43:20+00:00

Rollup of 9 pull requests Successful merges: - #67460 (Tweak impl signature mismatch errors involving `RegionKind::ReVar` lifetimes) - #71095 (impl From<[T; N]> for Box<[T]>) - #71500 (Make pointer offset methods/intrinsics const) - #71804 (linker: Support `-static-pie` and `-static -shared`) - #71862 (Implement RFC 2585: unsafe blocks in unsafe fn) - #72103 (borrowck `DefId` -> `LocalDefId`) - #72407 (Various minor improvements to Ipv6Addr::Display) - #72413 (impl Step for char (make Range* iterable)) - #72439 (NVPTX support for new asm!) Failed merges: r? @ghost

Rollup merge of #71095 - pickfire:box-from-array, r=dtolnay

2020-05-29T19:58:19+00:00

impl From<[T; N]> for Box<[T]> Based on https://github.com/rust-lang/rust/pull/68692

Rollup merge of #72701 - pickfire:patch-1, r=Mark-Simulacrum

2020-05-29T18:21:24+00:00

Fix grammar in liballoc raw_vec

Remove flaky test and document the other's flakiness

2020-05-29T10:24:26+00:00

Rollup merge of #72288 - vorner:stabilize-weak-into-raw, r=dtolnay

2020-05-29T06:06:55+00:00

Stabilization of weak-into-raw Closes #60728. There are also two removals of `#![feature(weak_into_raw)]` in the `src/tools/miri` submodule. How should I synchronize the changes with there? * I can ignore it for now and once this gets merged, update the tool, send a pull request to that one and then reference the changes to rustc. * I could try submitting the changes to miri first, but then the build would fail there, because the attribute would still be needed. I think the first one is the correct one, extrapolating from the contributing guidelines (even though they speak about breaking the tools and this should not break it, as extra feature should not hurt).

Fix grammar in liballoc raw_vec

2020-05-28T16:40:41+00:00

Rollup merge of #72533 - Diggsey:db-fix-arc-ub2, r=dtolnay

2020-05-27T01:09:12+00:00

Resolve UB in Arc/Weak interaction (2) Use raw pointers to avoid making any assertions about the data field. Follow up from #72479, see that PR for more detail on the motivation. @RalfJung I was able to avoid a lot of the changes to `Weak`, by making a helper type (`WeakInner`) - because of auto-deref and because the fields have the same name, the rest of the code continues to compile.