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It would be kind of embarrassing to ship with the "issue TBD" message!
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the same crate.
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feature-gate, on Rust 2018.
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This commit generalizes the existing `async_idents` lint to easily encompass
other identifiers that will be keywords in future editions. The new lint is
called `keyword_idents` and the old `async_idents` lint is registered as renamed
to this new lint.
As a proof of concept the `try` keyword was added to this list as it looks to be
listed as a keyword in the 2018 edition only. The `await` keyword was not added
as it's not listed as a keyword yet.
Closes #53077
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This commit updates the `unused_extern_crates` lint to make automatic
suggestions about removing `extern crate` annotations in the 2018 edition. This
ended up being a little easier than originally though due to what's likely been
fixed issues in the resolver!
Closes #52829
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Rollup of 17 pull requests
Successful merges:
- #53030 (Updated RELEASES.md for 1.29.0)
- #53104 (expand the documentation on the `Unpin` trait)
- #53213 (Stabilize IP associated constants)
- #53296 (When closure with no arguments was expected, suggest wrapping)
- #53329 (Replace usages of ptr::offset with ptr::{add,sub}.)
- #53363 (add individual docs to `core::num::NonZero*`)
- #53370 (Stabilize macro_vis_matcher)
- #53393 (Mark libserialize functions as inline)
- #53405 (restore the page title after escaping out of a search)
- #53452 (Change target triple used to check for lldb in build-manifest)
- #53462 (Document Box::into_raw returns non-null ptr)
- #53465 (Remove LinkMeta struct)
- #53492 (update lld submodule to include RISCV patch)
- #53496 (Fix typos found by codespell.)
- #53521 (syntax: Optimize some literal parsing)
- #53540 (Moved issue-53157.rs into src/test/ui/consts/const-eval/)
- #53551 (Avoid some Place clones.)
Failed merges:
r? @ghost
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Stabilize `use_extern_macros`
Closes https://github.com/rust-lang/rust/issues/35896
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Warn that `#![feature(rust_2018_preview)]` is implied when the edition is set to Rust 2018.
cc @varkor @petrochenkov @joshtriplett
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`uniform_paths` imports.
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is enabled.
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These migration lints aren't all up to par in terms of a good migration
experience. Some, like `unreachable_pub`, hit bugs like #52665 and unprepared
macros to be handled enough of the time. Others like linting against
`#[macro_use]` are swimming upstream in an ecosystem that's not quite ready (and
slightly buggy pending a few current PRs).
The general idea is that we will continue to recommend the `rust_2018_idioms`
lint group as part of the transition guide (as an optional step) but we'll be
much more selective about which lints make it into this group. Only those with a
strong track record of not causing too much churn will make the cut.
cc #52679
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* Enable the `raw_identifiers` feature automatically in the 2018 preview
* Only emit lint warnings if the `raw_identifiers` feature is activated
cc rust-lang/cargo#5783
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Lint `async` identifiers in 2018 preparation mode
r? @Manishearth
fixes https://github.com/rust-lang/rust/issues/49716
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This commit adds a lint to the compiler to warn against the `#[macro_use]`
directive as part of the `rust_2018_idioms` lint. This lint is turned off by
default and is only enabled when the `use_extern_macros` feature is also
enabled.
The lint here isn't fully fleshed out as it's just a simple warning rather than
suggestions of how to actually import the macro, but hopefully it's a good base
to start from!
cc #52043
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The intent here is to resolve #52202.
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Background:
The anonymous lifetime mode is used to prohibit elided lifetimes where
they didn't used to be permitted, and instead require that `'_` be
used. For example:
```rust
impl Trait for Ref<T> { .. }
// ^^^^^^ ERROR: should be `Ref<'_, T>`
```
When we are parsing the parts of the impl header, we enter into an
alternate mode called `CreateParameter`. In this mode, we give an
error for things like `Ref<T>`, but for elided lifetimes in a
reference type like `&T` we make the elided lifetime into an in-band
lifetime:
https://github.com/rust-lang/rust/blob/4f99f37b7e213d69a489884f651adfc6d217cef5/src/librustc/hir/lowering.rs#L4017-L4035
This was not intended to change behavior because we only enter into
that mode in contexts where elision was not historically
permitted. However, the problem is that we fail to reset the mode when
we enter into bounds like `Fn(&u32)`, where elision *was* allowed --
the same occurs for fn types like `fn(&u32`). This PR restores the
original mode in those contexts.
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r=alexcrichton
Issue 50970 migration lint fq path
Similar issue, but for fully qualified paths.
Fixes #50970
r? @alexcrichton
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fixes #50970
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This commit fixes another issue in the `absolute_path_not_starting_with_crate`
lint where it warns twice about an import which may contain `self`. It turns out
there were a few more locations that needed updating to use `root_id` and
`root_span` introduced in #50970 and after that it looks to work like a charm!
Closes #50978
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