Auto merge of #62704 - Mark-Simulacrum:rollup-oi94s2j, r=Mark-Simulacrum
Rollup of 14 pull requests
Successful merges:
- #62103 (Add debug assertions to write_bytes and copy*)
- #62405 (Remove never_type feature requirement for exhaustive patterns)
- #62491 (Fix Pin urls in Option documentation)
- #62533 (Add missing links for CannotReallocInPlace type)
- #62634 (Less unsafe in the array example of MaybeUninit docs)
- #62639 (Make VaListImpl<'f> invariant over the 'f lifetime)
- #62646 (Tweak wording in feature gate errors)
- #62662 (add spaces in front of trait requirements in libcore/cell.rs)
- #62668 (Fix #62660)
- #62673 (miri validation: better error messages for dangling references)
- #62680 (Actually call `visit_block_entry` in `DataflowResultsConsumer`)
- #62685 (Add info about undefined behavior to as_ref suggestions)
- #62689 (Fix typo in RawWaker::new documentation)
- #62698 (SGX target: don't pretend to be GNU/Linux to LLVM)
Mark Rousskov [Mon, 15 Jul 2019 23:55:10 +0000 (19:55 -0400)]
Rollup merge of #62668 - goodmanjonathan:fix-62660, r=estebank
Fix #62660
If the explicitly given type of a `self` parameter fails to parse correctly, we need to propagate the error rather than dropping it and causing an ICE.
Mark Rousskov [Mon, 15 Jul 2019 23:55:06 +0000 (19:55 -0400)]
Rollup merge of #62639 - immunant:invariant_valistimpl, r=eddyb
Make VaListImpl<'f> invariant over the 'f lifetime
After doing some research on variance and going back to look at `VaList` and `VaListImpl`, I realized that `VaList<'a, 'f>` is invariant over the `'f` lifetime (and covariant over `'a`), but `VaListImpl<'f>` isn't invariant but probably should be. This patch makes `VaListImpl<'f>` invariant over `'f`.
Mark Rousskov [Mon, 15 Jul 2019 23:55:04 +0000 (19:55 -0400)]
Rollup merge of #62634 - llogiq:uninit-array-docs, r=RalfJung
Less unsafe in the array example of MaybeUninit docs
I believe this is an acceptable way to initialize elements of `[MaybeUninit<T>; _]` arrays. Miri agrees. Conceptually, we are working at the array level, above the `MaybeUninit`, and as we are replacing it wholesale, this should pose no problem to soundness. And the code is easier to read.
Mark Rousskov [Mon, 15 Jul 2019 23:54:58 +0000 (19:54 -0400)]
Rollup merge of #62103 - RalfJung:debug-assert, r=alexcrichton
Add debug assertions to write_bytes and copy*
Looks like @nitnelave went MIA in https://github.com/rust-lang/rust/pull/58783, so I am re-submitting their PR, tweaked just a bit. I took care to preserve commit authorship.
Auto merge of #62687 - gnzlbg:stdarch, r=alexcrichton
Update stdsimd to stdarch
The stdsimd repository no longer lives in `rust-lang-nursery/stdsimd` but now lives in `rust-lang/stdarch` instead. This PR updates the stdsimd submodule to the stdarch master branch.
Auto merge of #62667 - petrochenkov:printattr2, r=Mark-Simulacrum
pprust: Improve pretty-printing of delimited token groups
The commit "Do not convert attributes into `MetaItem`s for printing" fixes https://github.com/rust-lang/rust/issues/62628.
Other commits fix regressions from abandoning `MetaItem`s, and make formatting for attributes, macro calls, macro definitions and other delimited token groups better and more consistent.
Jonathan Goodman [Sun, 14 Jul 2019 00:34:06 +0000 (19:34 -0500)]
Don't drop DiagnosticBuilder if parsing fails
If the explicitly given type of a `self` parameter fails to parse correctly,
we need to propagate the error rather than dropping it and causing an ICE.
Auto merge of #62560 - pietroalbini:tools-builders-on-prs, r=alexcrichton
ci: add a pr builder to test tools when submodules are updated
This PR adds the x86_64-gnu-tools builders to PRs where submodules are updated.
Since it's not possible to *start* the builder only when submodule changes are detected, I opted into adding a "decider" task at the start of the job which sets the `SKIP_JOB` environment variable when submodules are not updated, and I gated the most time-consuming tasks (the actual build and artifacts upload) on the variable not being there. All of this is conditionally included in the `steps/run.yml` only when a template parameter is present, so it should only affect that builder on PRs.
The cost for this should be a dummy builder running for 2/3 minutes for each PR, and we should be able to handle it.
Auto merge of #62584 - eddyb:circular-math-is-hard, r=pnkfelix
rustc_codegen_ssa: fix range check in codegen_get_discr.
Fixes #61696, see https://github.com/rust-lang/rust/issues/61696#issuecomment-505473018 for more details.
In short, I had wanted to use `x - a <= b - a` to check whether `x` is in `a..=b` (as it's 1 comparison instead of 2 *and* `b - a` is guaranteed to fit in the same data type, while `b` itself might not), but I ended up with `x - a + c <= b - a + c` instead, because `x - a + c` was the final value needed.
That latter comparison is equivalent to checking that `x` is in `(a - c)..=b`, i.e. it also includes `(a - c)..a`, not just `a..=b`, so if `c` is not `0`, it will cause false positives.
This presented itself as the non-niche ("dataful") variant sometimes being treated like a niche variant, in the presence of uninhabited variants (which made `c`, aka the index of the first niche variant, arbitrarily large).
Rollup merge of #62636 - alexcrichton:assert-build-cargo-once, r=Mark-Simulacrum
rustbuild: Improve assert about building tools once
In developing #61557 I noticed that there were two parts of our tools
that were rebuilt twice on CI. One was rustfmt fixed in #61557, but
another was Cargo. The actual fix for Cargo's double compile was
rust-lang/cargo#7010 and took some time to propagate here. In an effort
to continue to assert that Cargo is itself not compiled twice, I updated
the assertion in rustbuild at the time of working on #61557 but couldn't
land it because the fix wouldn't be ready until the next bootstrap.
The next bootstrap is now here, so the fix can now land! This does not
change the behavior of rustbuild but it is intended to catch the
previous iteration of compiling cargo twice. The main update here was to
consider more files than those in `$target/release/deps` but also
consider those in `$target/release`. That's where, for example,
`libcargo.rlib` shows up and it's the file we learn about, and that's
what we want to deduplicate.
Rollup merge of #62585 - pnkfelix:issue-60431-make-struct-tail-normalize-when-possible, r=eddyb
Make struct_tail normalize when possible
As noted in commit message: this replaces the existing methods to extract the struct tail(s) with new entry points that make the handling of normalization explicit.
Most of the places that call `struct_tail` are during codegen, post type-checking, and therefore they can get away with using `tcx.normalize_erasing_regions` (this is the entry point `struct_tail_erasing_lifetimes`)
For other cases that may arise, one can use the core method, which is parameterized over the normalization `Ty -> Ty` closure (`struct_tail_with_normalize`).
Or one can use the trivial entry point that does not normalization (`struct_tail_without_normalization`)
----
I spent a little while trying to make a test that exposed the bug via `impl Trait` rather than a projection, but I failed to find something that tripped up the current nightly `rustc`.
* I have *not* spent any time trying to make tests that trip up the other places where `struct_tail` was previously being called. While I do think the task of making such tests could be worthwhile, I am simply running out of time. (Its also possible that the layout code is always the first point called, and thus it may be pointless to try to come up with such tests.)
I also spent a little time discussing with @eddyb where this code should live. They suggested moving `struct_tail` and its sibling `struct_lockstep_tails` to the `LayoutCx`. But in the interest of time, I have left that refactoring (which may be questionable at this point) to a follow-up task.
Auto merge of #60266 - albins:polonius-liveness, r=nikomatsakis
Fact generation for liveness calculations in Polonius
This PR tracks ongoing work to extend `rustc` with support for generating variable use, definition, and later also drop output for the Polonius solver, the whole of which is being tracked in [Polonius Issue #104](https://github.com/rust-lang/polonius/issues/104).
Auto merge of #61953 - Centril:shared-from-iter, r=RalfJung
Add `impl<T> FromIterator<T> for Arc/Rc<[T]>`
Add implementations of `FromIterator<T> for Arc/Rc<[T]>` with symmetrical logic.
This also takes advantage of specialization in the case of iterators with known length (`TrustedLen`) to elide the final allocation/copying from a `Vec<T>` into `Rc<[T]>` because we can allocate the space for the `Rc<[T]>` directly when the size is known. This is the primary motivation and why this is to be preferred over `iter.collect::<Vec<_>>().into(): Rc<[T]>`.
Moreover, this PR does some refactoring in some places.
r? @RalfJung for the code
cc @alexcrichton from T-libs
Auto merge of #62635 - Centril:rollup-potvfnk, r=Centril
Rollup of 12 pull requests
Successful merges:
- #61535 (Coherence test when a generic type param has a default value from an associated type)
- #62274 (rustc_mir: follow FalseUnwind's real_target edge in qualify_consts.)
- #62431 (Add messages to `Option`'s and `Result`'s `must_use` annotation for `is_*`)
- #62453 (in which we suggest anonymizing single-use lifetimes in paths )
- #62568 (Replace unsafe_destructor_blind_to_params with may_dangle)
- #62578 (Add test for #49919)
- #62595 (Document that the crate keyword refers to the project root)
- #62599 (move mem::uninitialized deprecation back by 1 release, to 1.39)
- #62605 (Emit dropped unemitted errors to aid in ICE debugging)
- #62607 (Correctly break out of recovery loop)
- #62608 (`async unsafe fn` tests)
- #62623 (downgrade indirect_structural_match lint to allow)
Alex Crichton [Thu, 6 Jun 2019 14:56:07 +0000 (07:56 -0700)]
rustbuild: Improve assert about building tools once
In developing #61557 I noticed that there were two parts of our tools
that were rebuilt twice on CI. One was rustfmt fixed in #61557, but
another was Cargo. The actual fix for Cargo's double compile was
rust-lang/cargo#7010 and took some time to propagate here. In an effort
to continue to assert that Cargo is itself not compiled twice, I updated
the assertion in rustbuild at the time of working on #61557 but couldn't
land it because the fix wouldn't be ready until the next bootstrap.
The next bootstrap is now here, so the fix can now land! This does not
change the behavior of rustbuild but it is intended to catch the
previous iteration of compiling cargo twice. The main update here was to
consider more files than those in `$target/release/deps` but also
consider those in `$target/release`. That's where, for example,
`libcargo.rlib` shows up and it's the file we learn about, and that's
what we want to deduplicate.
Rollup merge of #62599 - RalfJung:uninit, r=cramertj
move mem::uninitialized deprecation back by 1 release, to 1.39
As per discussion at https://github.com/rust-lang/rust/issues/53491#issuecomment-509271182. Three releases also agrees with the precedent from `trim_left/right`. Three releases means that even nightly users (including rustc itself) get a full cycle from when the announcement is made in the stable release to when nightly starts to warn.
Rollup merge of #62595 - ngoldbaum:path-clarity-doc, r=Centril
Document that the crate keyword refers to the project root
:wave: this is my first rust contribution so I hope I'm doing everything correctly. Help very much appreciated if I'm not.
As far as I can tell this use of `crate` is only documented [in the edition guide for rust 2018](https://doc.rust-lang.org/edition-guide/rust-2018/module-system/path-clarity.html#the-crate-keyword-refers-to-the-current-crate). However it should probably be in the documentation for the `crate` keyword itself. This adds that documentation.
Rollup merge of #62568 - lzutao:replace_may_dangle, r=matthewjasper
Replace unsafe_destructor_blind_to_params with may_dangle
This PR will completely remove support for `#[unsafe_destructor_blind_to_params]` attribute,
which is deprecated in #38970 by `[may_dangle]` unsafe attribute.
Rollup merge of #61535 - ohadravid:test-generic-with-default-assiociated-type-re-rebalance-coherence, r=nikomatsakis
Coherence test when a generic type param has a default value from an associated type
A followup on #61400.
Before `re_rebalance_coherence`, this fails to compile (even though it should be accepted).
`re_rebalance_coherence` had no direct test for this, and I wanted to (a) make sure it doesn't regress in the future and (b) get it on record that this is actually the intended behavior.
Change `indirect_structural_match` lint to allow-by-default.
This is a way to address the regression aspect of rust-lang/rust#62614 in the
short term without actually fixing the bug. (My thinking is that the bug that
this lint detects has gone undetected for this long, it can wait a bit longer
until I or someone else has a chance to put in a proper fix that accounts for
rust-lang/rust#62614.)
Auto merge of #61462 - GuillaumeGomez:fix-local-storage, r=Manishearth
[rustdoc] Fix storage usage when disabled
Fixes #61239.
@starblue: Can you give a try to this change please? I tried on chrome and firefox and both worked so if you're using another web browser, that might be useful. :)
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