config.toml.example: Update remap-debuginfo doc to be more general & accurate
This makes it more obvious that the work-around to #74786 is actually correct, and a custom `--remap-path-prefix` isn't needed.
In fact the previous comment `/rustc/$hash/$crate` was wrong, it is not `$crate` but whatever path exists in the rustc source tree, so either `src/$crate` or `vendor/$crate`. I've fixed that as well to avoid future confusion.
Separate `missing_doc_code_examples` from intra-doc links
These two lints have no relation other than both being nightly-only.
This allows stabilizing intra-doc links without stabilizing `missing_doc_code_examples`.
Fixes one of the issues spotted by @ollie27 in https://github.com/rust-lang/rust/pull/74430#issuecomment-664693080.
r? @Manishearth
These two lints have no relation other than both being nightly-only.
This allows stabilizing intra-doc links without stabilizing
missing_doc_code_examples.
mv std libs to library/
This is the first step in refactoring the directory layout of this repository, with further followup steps planned (but not done yet).
Background: currently, all crates are under src/, without nested src directories and with the unconventional `lib*` prefixes (e.g., `src/libcore/lib.rs`). This directory structures is not idiomatic and makes the `src/` directory rather overwhelming. To improve contributor experience and make things a bit more approachable, we are reorganizing the repo a bit.
In this PR, we move the standard libs (basically anything that is "runtime", as opposed to part of the compiler, build system, or one of the tools, etc). The new layout moves these libraries to a new `library/` directory in the root of the repo. Additionally, we remove the `lib*` prefixes and add nested `src/` directories. The other crates/tools in this repo are not touched. So in summary:
```
library/<crate>/src/*.rs
src/<all the rest> // unchanged
```
where `<crate>` is:
- core
- alloc
- std
- test
- proc_macro
- panic_abort
- panic_unwind
- profiler_builtins
- term
- unwind
- rtstartup
- backtrace
- rustc-std-workspace-*
There was a lot of discussion about this and a few rounds of compiler team approvals, FCPs, MCPs, and nominations. The original MCP is https://github.com/rust-lang/compiler-team/issues/298. The final approval of the compiler team was given here: https://github.com/rust-lang/rust/pull/73265#issuecomment-659498446.
The name `library` was chosen to complement a later move of the compiler crates to a `compiler/` directory. There was a lot of discussion around adding the nested `src/` directories. Note that this does increase the nesting depth (plausibly important for manual traversal of the tree, e.g., through GitHub's UI or `cd`), but this is deemed to be better as it fits the standard layout of Rust crates throughout most of the ecosystem, though there is some debate about how much this should apply to multi-crate projects. Overall, there seem to be more people in favor of nested `src/` than against.
After this PR, there are no dependencies out of the `library/` directory except on the `build_helper` (or crates.io crates).
Derive common traits for panic::Location.
Now that `#[track_caller]` is on track to stabilize, one of the roughest edges of working with it is the fact that you can't do much with `Location` except turn it back into a `(&str, u32, u32)`. Which makes sense because the type was defined around the panic machinery originally passing around that tuple (it has the same layout as Location even).
This PR derives common traits for the type in accordance with the [API guidelines](https://rust-lang.github.io/api-guidelines/interoperability.html#types-eagerly-implement-common-traits-c-common-traits) (those apply to core, right?).
There's a risk here, e.g. if we ever change the representation of `Location` in a way that makes it harder to implement `Ord`, we might not be able to make that change in a backwards-compatible way. I don't think there's any other compatibility hazard here, as the only changes we currently imagine for the type are to add end fields.
cc @rust-lang/libs
More ensure stack to avoid segfault with increased `recursion_limit`
Fixes#74711
I do not add the test here since the limit value depends on the machine and it's hard to test the output.
r? @oli-obk
rustbuild: fix bad usage of UNIX exec() in rustc wrapper
exec never returns, it replaces the current process. so anything after it is unreachable. that's not how exec_cmd() is used in the surrounding code
We use `--on-fail env` on Debian. `env` always returns exit code 0. This means that the `rustc` bootstrap wrapper always returns exit code 0 even when it fails. However, the crossbeam-utils build process (due to autocfg) relies on `rustc` returning error exit codes when detecting CPU features, and ends up writing `cargo:rustc-cfg=has_atomic_u128` even when it's not detected, because the `rustc` wrapper is always giving exit code 0.
(This separately is causing our builds to try to compile rustc 40+ times, due to #74801.)
Forbid generic parameters in anon consts inside of type defaults
Emit a resolution error for `struct Foo<T, U = [u8; std::mem::size_of::<T>()]>`.
We are unable to support this with the way `ty::Generics` is currently used,
so let's just forbid it entirely for now.
Fixes some ICE on stable, e.g.
```rust
struct Foo<T, U = [u8; std::mem::size_of::<*mut T>()]>(T, U);
```
r? @varkor @eddyb
