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Fix some doc links
The futures crate CI always fails because of these intra doc links. I hope that this will fix this issue.
r? @steveklabnik
@cramertj
Edit: I added @steveklabnik as reviewer because this PR also adjusts a link in `src/libstd/error.rs`
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Bootstrap from 1.28.0 beta
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Implement PartialEq between &str and OsString
This fixes #49854.
It allows equality comparison between `OsString` values and `str` references, such as `os_string == "something"`.
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This matches std::collections
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Allows for example `os_string == "something"`
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Add a fallback for stacktrace printing for older Windows versions.
Some time ago we switched stack inspection functions of dbghelp.dll to their newer alternatives that also capture inlined context.
Unfortunately, said new alternatives are not present in older dbghelp.dll versions.
In particular Windows 7 at the time of writing has dbghelp.dll version 6.1.7601 from 2010, that lacks StackWalkEx and friends.
Tested on my Windows 7 - both msvc and gnu versions produce a readable stacktrace.
Fixes #50138
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park/park_timeout: prohibit spurious wakeups in next park
<pre><code>
// The implementation currently uses the trivial strategy of a Mutex+Condvar
// with wakeup flag, which does not actually allow spurious wakeups.
</pre></code>
Because does not actually allow spurious wakeups.
so we have let thread.inner.cvar.wait(m) in the loop to prohibit spurious wakeups.
but if notified after we locked, this notification doesn't be consumed, it return, the next park will consume this notification...this is also 'spurious wakeup' case, 'one unpark() wakeups two park()'.
We should improve this situation：
`thread.inner.state.store(EMPTY, SeqCst);`
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.. and pass them around in BacktraceContext.
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.. rather than having them be one giant match statement.
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PR #47252 switched stack inspection functions of dbghelp.dll
to their newer alternatives that also capture inlined context.
Unfortunately, said new alternatives are not present in older
dbghelp.dll versions.
In particular Windows 7 at the time of writing has dbghelp.dll
version 6.1.7601 from 2010, that lacks StackWalkEx and friends.
Fixes #50138
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Fix the error reference for LocalKey::try_with
There's no such thing as `ThreadLocalError` and the method obviously returns `AccessError`, so adjusting (probably only outdated docs).
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Document round-off error in `.mod_euc()`-method, see issue #50179
Due to a round-off error the method `.mod_euc()` of both `f32` and `f64` can produce mathematical invalid outputs. If `self` in magnitude is much small than the modulus `rhs` and negative, `self + rhs` in the first branch cannot be represented in the given precision and results into `rhs`. In the mathematical strict sense, this breaks the definition. But given the limitation of floating point arithmetic it can be thought of the closest representable value to the true result, although it is not strictly in the domain `[0.0, rhs)` of the function. It is rather the left side asymptotical limit. It would be desirable that it produces the mathematical more sound approximation of `0.0`, the right side asymptotical limit. But this breaks the property, that `self == self.div_euc(rhs) * rhs + a.mod_euc(rhs)`.
The discussion in issue #50179 did not find an satisfying conclusion to which property is deemed more important. But at least we can document the behaviour. Which this pull request does.
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This change is the final step in improving the semantics of
zx_cprng_draw. Now the syscall always generates the requested number of
bytes. If the syscall would have failed to generate the requested number
of bytes, the syscall either terminates the entire operating system or
terminates the calling process, depending on whether the error is a
result of the kernel misbehaving or the userspace program misbehaving.
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This reverts commit 21d09b983de87fec2e98832f4c30b52f12d6342f.
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These were stabilized in March 2018's #47813, and are the Preferred Way
to Do It going forward (q.v. #51043).
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Remove unnecessary stat64 pointer casts
In effect, these just casted `&mut stat64` to `*mut stat64`, twice.
That's harmless, but it masked a problem when this was copied to new
code calling `fstatat`, which takes a pointer to `struct stat`. That
will be fixed by #51785, but let's remove the unnecessary casts here
too.
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New safe associated functions for PinMut
- Add safe `get_mut` and `map`
- Rename unsafe equivalents to `get_mut_unchecked` and `map_unchecked`
The discussion about this starts [in this comment](https://github.com/rust-lang/rust/issues/49150#issuecomment-399604573) on the tracking issue.
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Fix unknown windows build
Fixes #51618.
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Link panic and compile_error docs
This adds documentation links between `panic!()` and `compile_error!()` as per #47275, which points out that they’re similar. It also adds a sentence to the `compile_error()` docs I thought could be added.
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Fix possibly endless loop in ReadDir iterator
Certain directories in `/proc` can cause the `ReadDir` iterator to loop indefinitely. We get an error code (22) when calling libc's `readdir_r` on these directories, but `entry_ptr` is `NULL` at the same time, signalling the end of the directory stream.
This change introduces an internal state to the iterator such that the `Some(Err(..))` value will only be returned once when calling `next`. Subsequent calls will return `None`.
fixes #50619
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In effect, these just casted `&mut stat64` to `*mut stat64`, twice.
That's harmless, but it masked a problem when this was copied to new
code calling `fstatat`, which takes a pointer to `struct stat`. That
will be fixed by #51785, but let's remove the unnecessary casts here
too.
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It now details why using compile_error!() is different from just not having the final macro_rules!() branch.
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Fixes #47275. These two macros are similar, but different, and could do with documentation links to each other.
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