error-code docs improvements (No. 2)
- Added empty error-code docs for `E0208`, `E0640` and `E0717` with the "internal" header as discussed on Discord.
- Wrote docs and UI test for `E0711`, again with the header.
- `tidy` changes are common-sense and make everything pass, `style.rs` hack is annoying though.
r? ```@GuillaumeGomez```
Use FxIndexSet when updating obligation causes in `adjust_fulfillment_errors_for_expr_obligation`
I have no idea how to test this reliably, but I've **manually** verified it fixes the instability in #106417 that isn't due to dtolnay/trybuild#212.
Fixes#106417
Simplify some canonical type alias names
* delete the `Canonicalized<'tcx>` type alias in favor for `Canonical<'tcx>`
* `CanonicalizedQueryResponse` -> `CanonicalQueryResponse`
I don't particularly care about the latter, but it should be consistent. We could alternatively delete the first alias and rename the struct to `Canonicalized`, and then keep the name of `CanonicalizedQueryResponse` untouched.
Move `check_region_obligations_and_report_errors` to `TypeErrCtxt`
Makes sense for this function to live with its sibling `resolve_regions_and_report_errors`, around which it's basically just a wrapper.
Enable Shadow Call Stack for Fuchsia on AArch64
Fuchsia already uses SCS by default for C/C++ code on ARM hardware. This patch allows SCS to be used for Rust code as well.
Fix ui constant tests for big-endian platforms
A number of tests under ui/const-ptr and ui/consts are currently failing on big-endian platforms as the binary encoding of some constants is hard-coded in the stderr test files.
Fix this by a combination of two types of changes:
- Where possible (i.e. where the particular value of a constant does not affect the purpose of the test), choose constant values that have the same encoding on big- and little-endian platforms.
- Where this is not possible, provide a normalize-stderr-test rule that transforms the printed big-endian encoding of such constants into the corresponding little-endian form.
Fixes part of https://github.com/rust-lang/rust/issues/105383.
Remove invalid case for mutable borrow suggestion
If we have a call such as `foo(&mut buf)` and after reference
collapsing the type is inferred as `&T` where-as the required type is
`&mut T`, don't suggest `foo(&mut mut buf)`. This is wrong syntactically
and the issue lies elsewhere, not in the borrow.
Fixes#105645
Change a commit_if_ok call to probe
Removes an over-eager `commit_if_ok` which makes inference worse.
I'm not entirely sure whether it's ok to remove the check that types are the same, because casting seems to cause equality checks with incorrect types?
Fixes#105037
r? ```@BoxyUwU```
Always permit ConstProp to exploit arithmetic identities
Fixes https://github.com/rust-lang/rust/issues/72751
Initially, I thought I would need to enable operand propagation then do something else, but actually https://github.com/rust-lang/rust/pull/74491 already has the fix for the issue in question! It looks like this optimization was put under MIR opt level 3 due to possible soundness/stability implications, then demoted further to MIR opt level 4 when MIR opt level 2 became associated with `--release`.
Perhaps in the past we were doing CTFE on optimized MIR? We aren't anymore, so this optimization has no stability implications.
r? `@oli-obk`
Simplify match statement
Add multiple tests
- 1 test for checking `N + 1 + 1` does not unify with `N+1`
- 2 tests for checking that a function that uses two parameters only returns the parameter that
is actually used.
- Check exact repeat predicates
Instead of just switching to a probe, check for different matches, and see how many there are.
If one, unify it, otherwise return true and let it be unified later.
Rollup of 8 pull requests
Successful merges:
- #104163 (Don't derive Debug for `OnceWith` & `RepeatWith`)
- #106131 (Mention "signature" rather than "fn pointer" when impl/trait methods are incompatible)
- #106363 (Structured suggestion for `&mut dyn Iterator` when possible)
- #106497 (Suggest using clone when we have &T and T implemented Clone)
- #106584 (Document that `Vec::from_raw_parts[_in]` must be given a pointer from the correct allocator.)
- #106600 (Suppress type errors that come from private fields)
- #106602 (Add goml scripts to tidy checks)
- #106606 (Do not emit structured suggestion for turbofish with wrong span)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Document that `Vec::from_raw_parts[_in]` must be given a pointer from the correct allocator.
Currently, the documentation of `Vec::from_raw_parts` and `Vec::from_raw_parts_in` says nothing about what allocator the pointer must come from. This PR adds that missing information explicitly.
Don't derive Debug for `OnceWith` & `RepeatWith`
Closures don't impl Debug, so the derived impl is kinda useless. The behavior of not debug-printing closures is consistent with the rest of the iterator adapters/sources.
Loosen the bound on the Debug implementation of Weak.
Both `rc::Weak<T>` and `sync::Weak<T>` currently require `T: Debug` in their own `Debug` implementations, but they don't currently use it; they only ever print a fixed string.
A general implementation of Debug for Weak that actually attempts to upgrade and rely on the contents is unlikely in the future because it may have unbounded recursion in the presence of reference cycles, which Weak is commonly used in. (This was the justification for why the current implementation [was implemented the way it is](f0976e2cf3)).
When I brought it up [on the forum](https://internals.rust-lang.org/t/could-the-bound-on-weak-debug-be-relaxed/15504), it was suggested that, even if an implementation is specialized in the future that relies on the data stored within the Weak, it would likely rely on specialization anyway, and could therefore easily specialize on the Debug bound as well.
Add retry mechanism for rustdoc GUI tests to reduce flakyness
Part of #93784.
I added 3 retries for failing GUI tests. An important note: if more than half of total tests fail, I don't retry because it's very likely not flakyness anymore at this point but a missing update after changes.
