Fix warning when libcore is compiled with no_fp_fmt_parse
Discovered when trying to compile Rust-for-Linux with Rust 1.66 beta.
It'll be helpful if this is backported to beta (should be trivial enough for backporting), so Rust-for-Linux's rust version bump wouldn't need to do `--cap-lints allow` for libcore.
Add help for `#![feature(impl_trait_in_fn_trait_return)]`
This adds a new variant `ImplTraitContext::FeatureGated`, so we can
generalize the help for `return_position_impl_trait_in_trait` to also
work for `impl_trait_in_fn_trait_return`.
cc #99697
Stop passing -export-dynamic to wasm-ld.
-export-dynamic was a temporary hack added in the early days of the Rust wasm32 target when Rust didn't have a way to specify wasm exports in the source code. This flag causes all global symbols, and some compiler-internal symbols, to be exported, which is often more than needed.
Rust now does have a way to specify exports in the source code: `#[export_name = "..."]`.
So as the original comment suggests, -export-dynamic can now be removed, allowing users to have smaller binaries and better encapsulation in their wasm32-unknown-unknown modules.
It's possible that this change will require existing wasm32-unknown-unknown users will to add explicit `#[export_name = "..."]` directives to exporrt the symbols that their programs depend on having exported.
make retagging work even with 'unstable' places
This is based on top of https://github.com/rust-lang/rust/pull/105301. Only the last two commits are new.
While investigating https://github.com/rust-lang/unsafe-code-guidelines/issues/381 I realized that we would have caught this issue much earlier if the add_retag pass wouldn't bail out on assignments of the form `*ptr = ...`.
So this PR changes our retag strategy:
- When a new reference is created via `Rvalue::Ref` (or a raw ptr via `Rvalue::AddressOf`), we do the retagging as part of just executing that address-taking operation.
- For everything else, we still insert retags -- these retags basically serve to ensure that references stored in local variables (and their fields) are always freshly tagged, so skipping this for assignments like `*ptr = ...` is less egregious.
r? ```@oli-obk```
kmc-solid: `std::sys` code maintenance
Includes a set of changes to fix the [`*-kmc-solid_*`](https://doc.rust-lang.org/nightly/rustc/platform-support/kmc-solid.html) Tier 3 targets and make some other improvements.
- Address `fuzzy_provenance_casts` by using `expose_addr` and `from_exposed_addr` for pointer-integer casts
- Add a stub implementation of `is_terminal` (#98070)
- Address `unused_imports` and `unused_unsafe`
- Stop doing `Box::from_raw(&*(x: Box<T>) as *const T as *mut T)`
Detect long types in E0308 and write them to disk
On type error with long types, print an abridged type and write the full type to disk.
Print the widest possible short type while still fitting in the terminal.
* The rule `display: block` had no noticeable effect. Technically, because
markdown tables have a tbody and thead, they get wrapped in an [anonymous
table box] in the CSS tree, nested within the `<table>` element's block
layout box.
This rule was added in #87230 to make the table side-scrolling, but
this same issue was doubly fixed in #88742 by wrapping it in an explicit
`<div>` tag. Since accessibility advocates recommend the wrapper div over
marking the table as `display: block`, we'll stick with that.
https://adrianroselli.com/2020/11/under-engineered-responsive-tables.html
* The rule `width: calc(100% - 2px)` had no visible effect, because the
anonymous table box was not affected.
* The style is tweaked to basically be the same style GitHub uses.
In particular, it adds zebra stripes, and removes dotted borders.
[anonymous table box]: https://www.w3.org/TR/CSS2/tables.html#anonymous-boxes
Ensure that heap allocation does not occur in a thread until std::thread
is ready. This fixes issues with custom allocators that call
std:🧵:current(), since doing so prematurely initializes
THREAD_INFO and causes the following thread_info::set() to fail.
rustdoc: simplify CSS selectors for item table `.stab`
The module-item and import-item classes are attached to the item-left. Just target that, instead.
normalize before handling simple checks for evaluatability of `ty::Const`
`{{{{{{{ N }}}}}}}` is desugared into a `ConstKind::Unevaluated` for an anonymous `const` item so when calling `is_const_evaluatable` on it we skip the `ConstKind::Param(_) => Ok(())` arm which is incorrect.
Simplify attribute handling in rustc_ast_lowering
Given that attributes is stored in a separate BTreeMap, it's not necessary to pass it in when constructing `hir::Expr`. We can just construct `hir::Expr` and then call `self.lower_attrs` later if it needs attributes.
As most desugaring code don't use attributes, this allows some code cleanup.
Pass on null handle values to child process
Fixes#101645
In Windows, stdio handles are (semantically speaking) `Option<Handle>` where `Handle` is a non-zero value. When spawning a process with `Stdio::Inherit`, Rust currently turns zero values into `-1` values. This has the unfortunate effect of breaking console subprocesses (which typically need stdio) that are spawned from gui applications (that lack stdio by default) because the console process won't be assigned handles from the newly created console (as they usually would in that situation). Worse, `-1` is actually [a valid handle](https://doc.rust-lang.org/std/os/windows/io/struct.OwnedHandle.html) which means "the current process". So if a console process, for example, waits on stdin and it has a `-1` value then the process will end up waiting on itself.
This PR fixes it by propagating the nulls instead of converting them to `-1`.
While I think the current behaviour is a mistake, changing it (however justified) is an API change so I think this PR should at least have some input from t-libs-api. So choosing at random...
r? `@joshtriplett`
