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Add rustc SHA to released DWARF debuginfo
This commit updates the debuginfo that is encoded in all of our released
artifacts by default. Currently it has paths like `/checkout/src/...` but these
are a little inconsistent and have changed over time. This commit instead
attempts to actually define the file paths in our debuginfo to be consistent
between releases.
All debuginfo paths are now intended to be `/rustc/$sha` where `$sha` is the git
sha of the released compiler. Sub-paths are all paths into the git repo at that
`$sha`.
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This commit updates the debuginfo that is encoded in all of our released
artifacts by default. Currently it has paths like `/checkout/src/...` but these
are a little inconsistent and have changed over time. This commit instead
attempts to actually define the file paths in our debuginfo to be consistent
between releases.
All debuginfo paths are now intended to be `/rustc/$sha` where `$sha` is the git
sha of the released compiler. Sub-paths are all paths into the git repo at that
`$sha`.
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#53576 Renaming TyAnon -> TyOpaque
Fixes #53576
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This commit adds a normalization for line and column numbers in stderr
files where the line/col is from the source directory rather than
the test itself - thereby removing the need to update tests as
compiler source changes.
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[nll] improve the "fully elaborated type" case in region errors
Fixes #52533.
r? @nikomatsakis
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Implement associated existential types
r? @nikomatsakis
no idea if these work with generic traits. I'm going home for the day :rofl:
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introduce universes to NLL type check
This branch aims to fix #48071 and also advance chalk integration a bit at the same time. It re-implements the subtyping/type-equating check so that NLL doesn't "piggy back" on the subtyping code of the old type checker.
This new code uses the "universe-based" approach to handling higher-ranked lifetimes, which sidesteps some of the limitations of the current "leak-based" scheme. This avoids the ICE in #48071.
At the same time, I aim for this to potentially be a kind of optimization. This NLL code is (currently) not cached, but it also generates constraints without doing as much instantiation, substitution, and folding. Right now, though, it still piggy backs on the `relate_tys` trait, which is a bit unfortunate -- it means we are doing more hashing and things than we have to. I want to measure the see the perf. Refactoring that trait is something I'd prefer to leave for follow-up work.
r? @pnkfelix -- but I want to measure perf etc first
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Point to lifetime spans on lifetime errors
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Lowering cleanups [1/N]
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Suggestion for 'static impl Trait return
When encountering a named or anonymous sup requirement (for example,
`&'a self`) and a `'static` impl Trait return type, suggest adding the
`'_` lifetime constraing to the return type.
Fix #43719, #51282.
```
error: cannot infer an appropriate lifetime
--> $DIR/static-return-lifetime-infered.rs:17:16
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LL | fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
| ----------------------- this return type evaluates to the `'static` lifetime...
LL | self.x.iter().map(|a| a.0)
| ------ ^^^^
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| ...but this borrow...
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note: ...can't outlive the anonymous lifetime #1 defined on the method body at 16:5
--> $DIR/static-return-lifetime-infered.rs:16:5
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LL | / fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
LL | | self.x.iter().map(|a| a.0)
LL | | }
| |_____^
help: you can add a constraint to the return type to make it last less than `'static` and match the anonymous lifetime #1 defined on the method body at 16:5
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LL | fn iter_values_anon(&self) -> impl Iterator<Item=u32> + '_ {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
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Add existential type definitions
Note: this does not allow creating named existential types, it just desugars `impl Trait` to a less (but still very) hacky version of actual `existential type` items.
r? @nikomatsakis
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When encountering a named or anonymous sup requirement (for example,
`&'a self`) and a `'static` impl Trait return type, suggest adding the
`'_` lifetime constraing to the return type.
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Underline multiple suggested replacements in the same line
<img width="685" alt="screen shot 2018-05-22 at 21 06 48" src="https://user-images.githubusercontent.com/1606434/40403051-174f3180-5e04-11e8-86b6-261630c5ff80.png">
Follow up to #50943.
Fix #50977.
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When suggesting code that has a shorter span than the current code,
account for this by keeping the offset as a signed value.
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