Rollup of 9 pull requests #44155
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Rollup of 9 pull requests #44155
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Make the ./x.py script fail when run with an invalid command, like: ./x.py nonsense This helps in case of chaining multiple runs, eg.: ./x.py biuld && ./x.py test
The crate itself is internally referenced by serde_derive.
This, as rust-lang#43813, is due to the author of rust-lang#43728 (specifically, 3645b06) being a damnably contemptible fool. Before this entire fiasco, we would return early from the unusedness late lints pass if the type of the expression within the `hir::StmtSemi` was `!`, `()`, or a boolean: these types would never get to the point of being marked as unused results. That is, until the dunce who somehow (!?) came to be trusted with the plum responsibility of implementing RFC 1940 (`#[must_use]` for functions) went and fouled everything up, removing the early returns based on the (stupid) thought that there would be no harm in it, since we would need to continue to check these types being returned from must_use functions (which was true for the booleans, at least). But there was harm—harm that any quarter-way-competent programmer would have surely forseen! For after the new functional-must-use checks, there was nothing to stop the previously-returned-early types from falling through to be marked by the unused-results lint!—a monumentally idiotic error that has cost the project tens of precious developer- and reviewer-minutes dealing with the fallout here and in rust-lang#43813. If 3645b06 is representative of the standard of craftsmanship the rising generation of software engineers holds themselves to, I weep for the future of our technological civilization. Resolves rust-lang#44119.
in particular: * show how to create an iterator that yields multiple socket addresses * show more failing scenarios
No need to depend on librustc! All we need is libstd Closes rust-lang#44140
…r=nikomatsakis Add hints when intercrate ambiguity causes overlap. I'm going to tackle rust-lang#23980. # Examples ## Trait impl overlap caused by possible downstream impl ```rust trait Foo<X> {} trait Bar<X> {} impl<X, T> Foo<X> for T where T: Bar<X> {} impl<X> Foo<X> for i32 {} fn main() {} ``` ``` error[E0119]: conflicting implementations of trait `Foo<_>` for type `i32`: --> test1.rs:4:1 | 3 | impl<X, T> Foo<X> for T where T: Bar<X> {} | ------------------------------------------ first implementation here 4 | impl<X> Foo<X> for i32 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `i32` | = note: downstream crates may implement Bar error: aborting due to previous error ``` ## Trait impl overlap caused by possible upstream update ```rust trait Foo {} impl<T> Foo for T where T: ::std::fmt::Octal {} impl Foo for () {} fn main() {} ``` ``` error[E0119]: conflicting implementations of trait `Foo` for type `()`: --> test2.rs:3:1 | 2 | impl<T> Foo for T where T: ::std::fmt::Octal {} | ----------------------------------------------- first implementation here 3 | impl Foo for () {} | ^^^^^^^^^^^^^^^^^^ conflicting implementation for `()` | = note: upstream crates may add new impl for std::fmt::Octal in future versions error: aborting due to previous error ``` ## Inherent impl overlap caused by possible downstream impl ```rust trait Bar<X> {} struct A<T, X>(T, X); impl<X, T> A<T, X> where T: Bar<X> { fn f(&self) {} } impl<X> A<i32, X> { fn f(&self) {} } fn main() {} ``` ``` error[E0592]: duplicate definitions with name `f` --> test3.rs:4:38 | 4 | impl<X, T> A<T, X> where T: Bar<X> { fn f(&self) {} } | ^^^^^^^^^^^^^^ duplicate definitions for `f` 5 | impl<X> A<i32, X> { fn f(&self) {} } | -------------- other definition for `f` | = note: downstream crates may implement Bar error: aborting due to previous error ``` ## Inherent impl overlap caused by possible upstream update ```rust struct A<T>(T); impl<T> A<T> where T: ::std::fmt::Octal { fn f(&self) {} } impl A<()> { fn f(&self) {} } fn main() {} ``` ``` error[E0592]: duplicate definitions with name `f` --> test4.rs:3:43 | 3 | impl<T> A<T> where T: ::std::fmt::Octal { fn f(&self) {} } | ^^^^^^^^^^^^^^ duplicate definitions for `f` 4 | impl A<()> { fn f(&self) {} } | -------------- other definition for `f` | = note: upstream crates may add new impl for std::fmt::Octal in future versions error: aborting due to previous error ```
…xamples, r=QuietMisdreavus Rewrite `std::net::ToSocketAddrs` doc examples. in particular: * show how to create an iterator that yields multiple socket addresses * show more failing scenarios done this as preliminary work while investigating rust-lang#22569 note: i haven't run doc tests on my machine for this, so would be good to confirm CI passes before approving
… r=Mark-Simulacrum bootstrap: remove unneeded extern crate The crate itself is internally referenced by serde_derive.
…_results, r=eddyb un-regress behavior of `unused_results` lint for booleans Resolves rust-lang#44119.
…matsakis compiletest: Change Config comments to doc comments I plan to make the same change in compiletest-rs, to have some documentation in [the docs](https://docs.rs/compiletest_rs/0.2.9/compiletest_rs/common/struct.Config.html).
…akis Fail ./x.py on invalid command Make the ./x.py script fail when run with an invalid command, like: ``` ./x.py nonsense ``` This helps in case of chaining multiple runs, eg.: ``` ./x.py biuld && ./x.py test ```
…etMisdreavus Fix invalid linker position Fixes rust-lang#44120. Result isn't "optimal" though because there are spaces at the end of some lines.
…r=Manishearth Deprecate several flags in rustdoc Part of rust-lang#44136 cc @rust-lang/dev-tools @rust-lang/docs This is a very basic PR to start deprecating some flags; `rustdoc` doesn't really have fancy output options like `rustc` does, so I went with `eprintln!`. Happy to change it if people feel that's not appropriate. Also, I have no idea if we can or should write tests here, so I didn't try. If someone feels strongly about it, then let's do it, but given that the only outcome here is a side effect...
…r=Mark-Simulacrum rustbuild: Fix dependencies of build-manifest No need to depend on librustc! All we need is libstd Closes rust-lang#44140
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r? @eddyb (rust_highfive has picked a reviewer for you, use r? to override) |
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std::net::ToSocketAddrsdoc examples. #44117, bootstrap: remove unneeded extern crate #44121, un-regress behavior ofunused_resultslint for booleans #44122, compiletest: Change Config comments to doc comments #44126, Fail ./x.py on invalid command #44134, Fix invalid linker position #44135, Deprecate several flags in rustdoc #44138, rustbuild: Fix dependencies of build-manifest #44144