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Using the wrong landing pad has obvious bad effects, like dropping a value
twice.
Testcase written by Alex Crichton.
Fixes #25089.
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Use a struct called Hole that keeps track of an invalid location
in the vector and fills the hole on drop.
I include a run-pass test that the current BinaryHeap fails, and the new
one passes.
Fixes #25842
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Debug overflow checks for arithmetic negation landed in #24500, at which time
the `abs` method on signed integers was changed to using `wrapping_neg` to
ensure that the function never panicked. This implied that `abs` of `INT_MIN`
would return `INT_MIN`, another negative value. When this change was back-ported
to beta, however, in #24708, the `wrapping_neg` function had not yet been
backported, so the implementation was changed in #24785 to `!self + 1`. This
change had the unintended side effect of enabling debug overflow checks for the
`abs` function. Consequently, the current state of affairs is that the beta
branch checks for overflow in debug mode for `abs` and the nightly branch does
not.
This commit alters the behavior of nightly to have `abs` always check for
overflow in debug mode. This change is more consistent with the way the standard
library treats overflow as well, and it is also not a breaking change as it's
what the beta branch currently does (albeit if by accident).
cc #25378
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Stripping unconfigured items prior to collecting crate metadata means we
can say things like `#![cfg_attr(foo, crate_type="lib")]`.
Fixes #25347.
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This commit is an implementation of [RFC 1040][rfc] which is a redesign of the
currently-unstable `Duration` type. The API of the type has been scaled back to
be more conservative and it also no longer supports negative durations.
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/1040-duration-reform.md
The inner `duration` module of the `time` module has now been hidden (as
`Duration` is reexported) and the feature name for this type has changed from
`std_misc` to `duration`. All APIs accepting durations have also been audited to
take a more flavorful feature name instead of `std_misc`.
Closes #24874
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Stripping unconfigured items prior to collecting crate metadata means we
can say things like `#![cfg_attr(foo, crate_type="lib")]`.
Fixes #25347.
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We don't have any pending snapshot-requiring changes. Closes #20184.
Works toward #3965.
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This commit is an implementation of [RFC 1040][rfc] which is a redesign of the
currently-unstable `Duration` type. The API of the type has been scaled back to
be more conservative and it also no longer supports negative durations.
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/1040-duration-reform.md
The inner `duration` module of the `time` module has now been hidden (as
`Duration` is reexported) and the feature name for this type has changed from
`std_misc` to `duration`. All APIs accepting durations have also been audited to
take a more flavorful feature name instead of `std_misc`.
Closes #24874
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We don't have any pending snapshot-requiring changes. Tests which
continue to be ignored are those that are broken by codegen changes.
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There is no subtyping relationship between the types (or their non-freshened
variants), so they can not be merged.
Fixes #22645
Fixes #24352
Fixes #23825
Should fix #25235 (no test in issue).
Should fix #19976 (test is outdated).
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* segfault due to not copying drop flag when coercing
* fat pointer casts
* segfault due to not checking drop flag properly
* debuginfo for DST smart pointers
* unreachable code in drop glue
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There is no subtyping relationship between the types (or their non-freshened
variants), so they can not be merged.
Fixes #22645
Fixes #24352
Fixes #23825
Should fix #25235 (no test in issue).
Should fix #19976 (test is outdated).
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core::slice was originally written to tolerate overflow (notably, with
slices of zero-sized elements), but it was never updated to use wrapping
arithmetic when overflow traps were added.
Also correctly handle the case of calling .nth() on an Iter with a
zero-sized element type. The iterator was assuming that the pointer
value of the returned reference was meaningful, but that's not true for
zero-sized elements.
Fixes #25016.
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It is currently broken to use syntax such as `<T as Foo>::U::static_method()` where `<T as Foo>::U` is an associated type. I was able to fix this and simplify the parser a bit at the same time.
This also fixes the corresponding issue with associated types (#22139), but that's somewhat irrelevant because #22519 is still open, so this syntax still causes an error in type checking.
Similarly, although this fix applies to associated consts, #25046 forbids associated constants from using type parameters or `Self`, while #19559 means that associated types have to always have one of those two. Therefore, I think that you can't use an associated const from an associated type anyway.
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Closes #18075.
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r? @nikomatsakis
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core::slice::Iter.ptr can be null when iterating a slice of zero-sized
elements, but the pointer value used for the slice itself cannot. Handle
this case by always returning a dummy pointer for slices of zero-sized
elements.
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core::slice was originally written to tolerate overflow (notably, with
slices of zero-sized elements), but it was never updated to use wrapping
arithmetic when overflow traps were added.
Also correctly handle the case of calling .nth() on an Iter with a
zero-sized element type. The iterator was assuming that the pointer
value of the returned reference was meaningful, but that's not true for
zero-sized elements.
Fixes #25016.
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There were still some mentions of `~[T]` and `~T`, mostly in comments and debugging statements. I tried to do my best to preserve meaning, but I might have gotten some wrong-- I'm happy to fix anything :)
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I've found that there are still huge amounts of occurrences of `task`s in the documentation. This PR tries to eliminate all of them in favor of `thread`.
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An automated script was run against the `.rs` and `.md` files,
subsituting every occurrence of `task` with `thread`. In the `.rs`
files, only the texts in the comment blocks were affected.
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The last one (at least for the moment :smiley:).
r? @alexcrichton
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The [UnsafeCell documentation says it is undefined behavior](http://doc.rust-lang.org/nightly/std/cell/struct.UnsafeCell.html), so people shouldn't do it.
This happened to catch one case in libstd that was doing this, and I switched that to use an UnsafeCell internally.
Closes #13146
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Closes #22463.
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Closes #22258.
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Closes #21562.
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Closes #22471.
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Closes #21174.
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Closes #20186.
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Closes #20174.
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Generalize dropck to ignore item-less traits
Fix #24805.
(This is the reopened + rebased version of PR #24898)
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Add several regression tests and remove some unnecessary FIXMEs.
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Closes #22471.
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Stack overflow detection does not currently work with MUSL, so this test needs
to be disabled.
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Closes #17170.
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