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and make it fallible
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Reverts PR #108031
Fixes (doesnt close until beta backported) #109746
This reverts commit e3f9db5fc319c6d8eee5d47d216ea6a426070c41.
This reverts commit 98b82aedba3f3f581e89df54352914b27f42c6f7.
This reverts commit 380fa264132ad481e73cbbf0f3a0feefd99a1d78.
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Smarter and simpler!
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Don't require a region to have an `external_name` in order to be
promoted.
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Don't call `temporary_scope` twice.
`mirror_expr_inner` calls `temporary_scope`. It then calls `make_mirror_unadjusted` which makes an identical call to `temporary_scope`.
This commit changes the `mirror_expr_inner` to get the `temp_lifetime` out of the expression produced by `make_mirror_unadjusted`, similar to how it currently gets the type.
r? `@cjgillot`
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Rollup of 6 pull requests
Successful merges:
- #108298 (Fix ICE: check if snippet is `)`)
- #108405 (Lazily compute crate name for consider_optimizing)
- #108656 (Rustdoc search: Emit an error for unclosed generic)
- #108660 (Remove ne implementations from strings)
- #108669 (Allow checking whether a type allows being uninitialized)
- #108727 (rustc_expand: make proc-macro derive error translatable)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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rustc_expand: make proc-macro derive error translatable
kept this tiny so as to point to it as an example in rustc-dev-guide
`@rustbot` label +A-translation
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Allow checking whether a type allows being uninitialized
This is useful for clippy ([rust-lang/clippy#10407](https://github.com/rust-lang/rust-clippy/issues/10407)) and for the future `MaybeUninit::assume_init` panics (#100423).
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r=WaffleLapkin
Lazily compute crate name for consider_optimizing
The extra query is unnecessary in the common case of not having fuel.
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Fix ICE: check if snippet is `)`
Fixes #107705
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Remove `NormalizationError::ConstantKind`
No longer in use by `TryNormalizeAfterErasingRegionsFolder` (as of #102355 / e8150fa60cc445de7a57db634deb0668880be593 it seems). It's making `LayoutError`, etc. kinda large -- that was noticed by `@zoxc.`
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Rollup of 8 pull requests
Successful merges:
- #104549 (add -Zexport-executable-symbols to unstable book)
- #108292 (Label opaque type for 'captures lifetime' error message)
- #108540 (Add `Atomic*::from_ptr`)
- #108634 (Add link to component dashboard)
- #108647 (Remove dead pgo.sh file)
- #108678 (Use `Option::as_slice` where applicable)
- #108681 (Improve comments in `needs_process_obligation`.)
- #108688 (Match unmatched backticks in library/)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
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Improve comments in `needs_process_obligation`.
And a couple of other places.
r? `@lqd`
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Use `Option::as_slice` where applicable
After #105871 introduced `Option::as_slice`, this PR uses it within the compiler. I found it interesting that all cases where `as_slice` could be used were done with different code before; so it seems the new API also has the benefit of being "the obvious solution" where before there was a mix of options, none clearly better than the rest.
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Label opaque type for 'captures lifetime' error message
Providing more information may help make this somewhat opaque (lol) error message a bit clearer.
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Match unmatched backticks in compiler/ comments
r? ``@Nilstrieb`` as per [advice](https://github.com/rust-lang/rust/pull/108685#issuecomment-1453018499)
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Match unmatched backticks in compiler/
Found with GNU grep:
```
grep -rEn '^(([^`]*`){2})*[^`]*`[^`]*$' compiler/ | rg -v '\s*[//]?.{1,2}```'
```
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Fix another ICE in `point_at_expr_source_of_inferred_type`
Types coming from method probes must only be investigated *structurally*, since they often contain escaping infer variables from generalization and autoderef. We already have a hack in this PR that erases variables from types, so just use that.
Fixes #108664
The note attached to this error is pretty bad:
```
here the type of `primes` is inferred to be `[_]`
```
But that's unrelated to the PR.
---
Side-note: This is a pretty easy to trigger beta regression, so I've nominated it. Alternatively, I'm slightly inclined to remove this code altogether until it can be reformulated to be more accurate and less ICEy.
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Remove legacy PM leftovers
This drops two leftovers of legacy PM usage:
* We don't need to initialize passes anymore.
* The pass listing was still using legacy PM passes. Replace it with the corresponding new PM listing.
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r=petrochenkov
Deny capturing late-bound non-lifetime param in anon const
Introduce a new AnonConstBoundary so we can detect when we capture a late-bound non-lifetime param with `non_lifetime_binders` enabled.
In the future, we could technically do something like introduce an early-bound parameter on the anon const, and stick the late-bound param in its substs (kinda like how we turn late-bound lifetimes in opaques into early-bound ones). But for now, just deny it so we don't ICE.
Fixes #108191
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new solver: implement canonicalization and region constraints
see the corresponding rustc-dev-guide chapter: https://rustc-dev-guide.rust-lang.org/solve/canonicalization.html
r? ``@compiler-errors``
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`mirror_expr_inner` calls `temporary_scope`. It then calls
`make_mirror_unadjusted` which makes an identical call to
`temporary_scope`.
This commit changes the `mirror_expr_inner` to get the `temp_lifetime`
out of the expression produced by `make_mirror_unadjusted`, similar to
how it currently gets the type.
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And a couple of other places.
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Feed queries on impl side for RPITITs when using lower_impl_trait_in_trait_to_assoc_ty
I've added a test for traits that were already working and what I think is probably the last bit of infrastructure work needed.
In following PRs I'm going to start adding things TDD style, tests and code that make it work.
r? `@compiler-errors`
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Make `ExprKind` the first field in `thir::Expr`
This makes its `Debug` impl print it first which is useful, as it's the most important part when looking at an expr.
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Explain compile-time vs run-time difference in env!() error message
This PR is clarifying error message of `env!()` based on this user question: https://users.rust-lang.org/t/environment-variable-out-dir-is-undefined/90067
It makes it clear that `env!()` is for env variables defined at compile-time. There's special-case help text for common Cargo build script variables.
I've also rearranged the code to avoid allocating error message on the happy path when the env var is defined.
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r=WaffleLapkin
Point error span at Some constructor argument when trait resolution fails
This is a follow up to #108254 and #106477 which extends error span refinement to handle a case which I mistakenly believed was handled in #106477. The goal is to refine the error span depicted below:
```rs
trait Fancy {}
impl <T> Fancy for Option<T> where T: Iterator {}
fn want_fancy<F>(f: F) where F: Fancy {}
fn example() {
want_fancy(Some(5));
// (BEFORE) ^^^^^^^ `{integer}` is not an iterator
// (AFTER) ^ `{integer}` is not an iterator
}
```
I had used a (slightly more complex) example as an illustrative example in #108254 , but hadn't actually turned it into a test, because I had (incorrectly) believed at the time it was covered by existing behavior. It turns out that `Some` is slightly "special" in that it resolves differently from the other `enum` constructors I had tried, and therefore this test was actually broken.
I've now updated the tests to include this example, and fixed the code to correctly resolve the `Some` constructor so that the span of the error is reduced.
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Support allocations with non-Box<[u8]> bytes
This is prep work for allowing miri to support passing pointers to C code, which will require `Allocation`s to be correctly aligned. Currently, it just makes `Allocation` generic and plumbs the necessary changes through the right places.
The follow-up to this will be adding a type in the miri interpreter which correctly aligns the bytes, using that for the Miri engine, then allowing Miri to pass pointers into these allocations to C calls.
Based off of #100467, credit to ```@emarteca``` for the code
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lower_impl_trait_in_trait_to_assoc_ty
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This is useful for clippy and for the future `MaybeUninit::assume_init`
panics.
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