Rollup of 12 pull requests #74073
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Rollup of 12 pull requests #74073
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Co-authored-by: Ralf Jung <post@ralfj.de>
The recursive check of `try_print_visible_def_path` did not properly handle the Rust 2018 case of crate-paths without 'extern crate'. Instead, it returned a "not found" via (false, self). This fixes issue rust-lang#56175.
The thread that recovers the unique access to Arc inner value (e.g., drop when ref-count strong reaches zero, successful try_unwrap), ensures that other operations on Arc inner value happened before by synchronizing with release operations performed when decrementing the reference counter. When try_unwrap succeeds, the current thread recovers the unique access to Arc inner value, so release is unnecessary.
added .collect() into String from Box<str> I have not created an rfc, because i felt like this is a very minor change. i have just set a random feature name and rust version as stability attribute, i expect to have to change that, i just don't know what the policy on that is. all guides i could find focused on contributing to the compiler, not contributing to the standard library. drawbacks: more code in the standard library, could be replaced with specialization: base-implementation for AsRef\<str> and specialization for String and Cow. i can write that code if ppl want it. advantages: using "real strings" i.e. Box\<str> is as ergonomic as string slices (&str) and string buffers (String) with iterators.
Add unstable docs for rustc_attrs r? @RalfJung
…-morse Some refactoring around intrinsic type checking So... This PR went a bit overboard. I wanted to make the `rustc_peek` intrinsic safe (cc @ecstatic-morse ), and remembered a long-standing itch of mine. So I made that huge `&str` match for the intrinsic name a match on `Symbol`s (so basically `u32`s). This is unlikely to have a positive perf effect, even if it likely has better codegen (intrinsics are used rarely, mostly once in their wrapper), so it's mostly a consistency thing since other places actually match on the symbol name of the intrinsics.
…r=petrochenkov Fix try_print_visible_def_path for Rust 2018 The recursive check of `try_print_visible_def_path` did not properly handle the Rust 2018 case of crate-paths without 'extern crate'. Instead, it returned a "not found" via (false, self). This fixes rust-lang#56175.
…, r=varkor
Explain exhaustive matching on {usize,isize} maximum values
The wording is taken from https://github.com/rust-lang/rfcs/blob/master/text/2591-exhaustive-integer-pattern-matching.md#reference-level-explanation.
Fixes rust-lang#73919
r? @varkor
Use `Span`s to identify unreachable subpatterns in or-patterns Fixes rust-lang#71977
…arkor add `lazy_normalization_consts` feature gate In rust-lang#71973 I underestimated the amount of code which is influenced by lazy normalization of consts and decided against having a separate feature flag for this. Looking a bit more into this, the following issues are already working with lazy norm in its current state rust-lang#47814 rust-lang#57739 rust-lang#73980 I therefore think it is worth it to enable lazy norm separately. Note that `#![feature(const_generics)]` still automatically activates this feature, so using `#![feature(const_generics, lazy_normalization_consts)]` is redundant. r? @varkor @nikomatsakis
Remove unnecessary release from Arc::try_unwrap The thread that recovers the unique access to Arc inner value (e.g., drop when ref-count strong reaches zero, successful try_unwrap), ensures that other operations on Arc inner value happened before by synchronizing with release operations performed when decrementing the reference counter. When try_unwrap succeeds, the current thread recovers the unique access to Arc inner value, so release is unnecessary. r? @Amanieu
Convert more `DefId`s to `LocalDefId`s
Fix spacing in Iterator fold doc
expected_found `&T` -> `T`
…=kennytm variant_count: avoid incorrect dummy implementation This also avoids a stage 0 doctest failure.
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📌 Commit e624363 has been approved by |
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☀️ Test successful - checks-actions, checks-azure |
This was referenced Jul 6, 2020
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📣 Toolstate changed by #74073! Tested on commit 0c03aee. 💔 rls on windows: test-pass → build-fail (cc @Xanewok). |
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Tested on commit rust-lang/rust@0c03aee. Direct link to PR: <rust-lang/rust#74073> 💔 rls on windows: test-pass → build-fail (cc @Xanewok). 💔 rls on linux: test-pass → build-fail (cc @Xanewok). 💔 rustfmt on windows: test-pass → build-fail (cc @topecongiro). 💔 rustfmt on linux: test-pass → build-fail (cc @topecongiro).
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Potential tool failure: This might be #74027 |
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This caused a slight perf regression on |
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Successful merges:
Spans to identify unreachable subpatterns in or-patterns #73973 (UseSpans to identify unreachable subpatterns in or-patterns)lazy_normalization_constsfeature gate #74000 (addlazy_normalization_constsfeature gate)DefIds toLocalDefIds #74027 (Convert moreDefIds toLocalDefIds)&T->T#74057 (expected_found&T->T)Failed merges:
r? @ghost