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Most notably this changes 'syntax::ext::base::get_single_str_from_tts'
to accept a trailing comma, and revises the documentation so that this
aspect is not surprising. I made this change under the understanding
that this crate is private rustc implementation detail (I hope this is
correct!). After reviewing all call sites, I believe the revised
semantics are closer to the intended spirit of the function.
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BREAKING CHANGE: (or perhaps, *bugfix*)
In #![no_std] applications, the following calls to `panic!` used
to behave differently; they now behave the same.
Old behavior:
panic!("{{"); // panics with "{{"
panic!("{{",); // panics with "{"
New behavior:
panic!("{{"); // panics with "{{"
panic!("{{",); // panics with "{{"
This only affects calls to `panic!` (and by proxy `assert`
and `debug_assert`) with a single string literal followed by
a trailing comma, and only in `#![no_std]` applications.
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r=estebank
Warn when rustc output conflicts with existing directories
When the compiled executable would conflict with a directory, display a
rustc error instead of a verbose and potentially-confusing linker
error. This is a usability improvement, and doesn’t actually change
behaviour with regards to compilation success. This addresses the
concern in #35887. Fixes #13098.
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save-analysis: avoid implicit unwrap
When looking up a field defintion, since the name might be incorrect in the field init shorthand case.
cc https://github.com/rust-lang-nursery/rls/issues/699
r? @eddyb
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Fix info about generic impls in AsMut docs
This text was copy-pasted from the `AsRef` docs to `AsMut`, but needed some additional adjustments for correctness.
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Fix rustdoc ICE on macros defined within functions
fixes #47639
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r=petrochenkov
Stabilize use_nested_groups
As requested in #44494. Documentation PRs already sent.
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Make wording around 0-cost casts more precise
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Update book
This PR does two things:
1. update the book to include https://github.com/rust-lang/book/pull/1088
2. update to mdbook 0.1
Both of these things are big changes, so I want to land them now, well before the next branch, so we can kick the tires.
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Locally, I'm seeing some weirdness around the reference and this:
Putting this PR up so others can try and build and see if it reproduces for them.
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Add a regression test for #44415
This PR adds a regression test for issue #44415.
Fixes #44415.
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Disallow mutable borrow to non-mut statics
Closes #42344.
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add documentation from doc(include) to analysis data
cc #44732
Currently save-analysis only loads docs from plain doc comments and doc attributes. Since `#[doc(include="filename.md")]` doesn't create a plain doc attribute when it loads the file, we need to be sure to pick up this info for the analysis data.
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Make inline assembly volatile if it has no outputs. Fixes #46026
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Update clippy and miri submodule
r? @Manishearth
cc @kennytm I needed to touch the miri submodule's Cargo.toml to make sure that clippy gets the newest compiletest_rs. This will not fix miri, but since I touched the miri submodule, will this PR fail?
miri is unfixable until #46882 is merged
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Fix overflow when performing drop check calculations in NLL
Clearing out the infcx's region constraints after processing each type
ends up interacting badly with normalizing associated types. This commit
keeps all region constraints intact until the end of
TypeLivenessGenerator.add_drop_live_constraint, ensuring that normalized
types are able to re-use existing inference variables.
Fixes #47589
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Fix ref-to-ptr coercions not working with NLL in certain cases
Implicit coercions from references to pointers were lowered to slightly
different Mir than explicit casts (e.g. 'foo as *mut T'). This resulted
in certain uses of self-referential structs compiling correctly when an
explicit cast was used, but not when the implicit coercion was used.
To fix this, this commit adds an outer 'Use' expr when applying a
raw-ptr-borrow adjustment. This makes the lowered Mir for coercions
identical to that of explicit coercions, allowing the original code to
compile regardless of how the raw ptr cast occurs.
Fixes #47722
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Cleanup the shim code
- We now write directly to `RETURN_PLACE` instead of creating intermediates
- `tuple_like_shim` takes an iterator (used by #47867)
- `tuple_like_shim` no longer relies on it being the first thing to create blocks, and uses relative block indexing in a cleaner way (necessary for #47867)
- All the shim builders take `dest, src` arguments instead of hardcoding RETURN_PLACE
r? @eddyb
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Rollup of 10 pull requests
- Successful merges: #47862, #47877, #47896, #47912, #47947, #47958, #47978, #47996, #47999, #47892
- Failed merges:
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When looking up a field defintion, since the name might be incorrect in the field init shorthand case.
cc https://github.com/rust-lang-nursery/rls/issues/699
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and improve printing of errors
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Includes https://github.com/rust-lang/book/pull/1088 and
https://github.com/rust-lang/book/commit/62210e326c27697e94ce429c1683dcea4e4887e4
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This text was copy-pasted from the `AsRef` docs to `AsMut`, but needed
some additional adjustments for correctness.
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Turn `type_id` into a constant intrinsic
https://github.com/rust-lang/rust/issues/27745
The method `get_type_id` in `Any` is intended to support reflection. It's currently unstable in favor of using an associated constant instead. This PR makes the `type_id` intrinsic a constant intrinsic, the same as `size_of` and `align_of`, allowing `TypeId::of` to be a `const fn`, which will allow using an associated constant in `Any`.
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Remove 'the this' in doc comments.
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Run the `run-make` tests last, so more tests run on Windows when `make` is unavailable
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ui tests: diff from old (expected) to new (actual) instead of backwards.
Previously `actual` was "old" and `expected` was "new" which resulted in `+` before `-`.
AFAIK all diff tools put `-` before `+`, which made the previous behavior *very confusing*.
r? @nikomatsakis
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Clarify shared file handler behavior of File::try_clone.
Fixes https://github.com/rust-lang/rust/issues/46578.
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r=petrochenkov
Stabilize feature(match_beginning_vert)
With this feature stabilized, match expressions can optionally have a `|` at the beginning of each arm.
Reference PR: rust-lang-nursery/reference#231
Closes #44101
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Use a range to identify SIGSEGV in stack guards
Previously, the `guard::init()` and `guard::current()` functions were
returning a `usize` address representing the top of the stack guard,
respectively for the main thread and for spawned threads. The `SIGSEGV`
handler on `unix` targets checked if a fault was within one page below that
address, if so reporting it as a stack overflow.
Now `unix` targets report a `Range<usize>` representing the guard memory,
so it can cover arbitrary guard sizes. Non-`unix` targets which always
return `None` for guards now do so with `Option<!>`, so they don't pay any
overhead.
For `linux-gnu` in particular, the previous guard upper-bound was
`stackaddr + guardsize`, as the protected memory was *inside* the stack.
This was a glibc bug, and starting from 2.27 they are moving the guard
*past* the end of the stack. However, there's no simple way for us to know
where the guard page actually lies, so now we declare it as the whole range
of `stackaddr ± guardsize`, and any fault therein will be called a stack
overflow. This fixes #47863.
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zackmdavis:and_the_case_of_the_necessary_unnecessary_parens, r=nikomatsakis
decline to lint technically-unnecessary parens in function or method arguments inside of nested macros
In #46980 ("in which the unused-parens lint..." (14982db2d6)), the
unused-parens lint was made to check function and method arguments,
which it previously did not (seemingly due to oversight rather than
willful design). However, in #47775 and discussion thereon,
user–developers of Geal/nom and graphql-rust/juniper reported that the
lint was seemingly erroneously triggering on certain complex macros in
those projects. While this doesn't seem like a bug in the lint in the
particular strict sense that the expanded code would, in fact, contain
unncecessary parentheses, it also doesn't seem like the sort of thing
macro authors should have to think about: the spirit of the
unused-parens lint is to prevent needless clutter in code, not to give
macro authors extra heartache in the handling of token trees.
We propose the expediency of declining to lint unused parentheses in
function or method args inside of nested expansions: we believe that
this should eliminate the petty, troublesome lint warnings reported
in the issue, without forgoing the benefits of the lint in simpler
macros.
It seemed like too much duplicated code for the `Call` and `MethodCall`
match arms to duplicate the nested-macro check in addition to each
having their own `for` loop, so this occasioned a slight refactor so
that the function and method cases could share code—hopefully the
overall intent is at least no less clear to the gentle reader.
This is concerning #47775.
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Do not ignore lifetime bounds in Copy impls
cc #29149
r? @nikomatsakis
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Fix const evaluation ICE in rustdoc
Fixes #47860.
r? @eddyb
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Do not enable ThinLTO on stable, beta, or nightly builds.
Fixes #45444
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unavailable
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Update RLS and Rustfmt
r? @alexcrichton
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This path was considered to be unreachable. However,
`&mut` could potentially live inside `static`.
For example, `static TAB: [&mut [u8]; 0] = [];`.
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rustc: prefer ParamEnvAnd and LayoutCx over tuples for LayoutOf.
This PR provides `tcx.layout_of(param_env.and(ty))` as the idiomatic replacement for the existing `(tcx, param_env).layout_of(ty)` and removes fragile (coherence-wise) layout-related tuple impls.
r? @nikomatsakis
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Dist builds should always be as fast as we can make them, and since
those run on CI we don't care quite as much for the build being somewhat
slower. As such, we don't automatically enable ThinLTO on builds for the
dist builders.
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Generator bugfixes
r? @nikomatsakis
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Fixes https://github.com/rust-lang/rust/issues/46578.
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elided lifetime
Closes #45992
Hey
Having a problem with my config so decided to make a WIP PR nevertheless. Will add some more tests.
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