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The `println!` calls in the previous version were never shown (at least
not in the playpen) because the main thread is finished before all the
spawned child threads were synchronized. This commit adds a join for
each thread handle to wait in the main thread until all child threads
are finished.
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Fix unsound behaviour with null characters in thread names (issue #32475)
Previously, the thread name (&str) was converted to a CString in the
new thread, but outside unwind::try, causing a panic to continue into FFI.
This patch changes that behaviour, so that the panic instead happens
in the parent thread (where panic infrastructure is properly set up),
not the new thread.
This could potentially be a breaking change for architectures who don't
support thread names.
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Add augmented assignment operator impls for time types
r? @alexcrichton
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std: Fix inheriting stdin on status()
This regression was accidentally introduced in #31618, and it's just flipping a
boolean!
Closes #32254
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r=pnkfelix
Restrict constants in patterns
This implements [RFC 1445](https://github.com/rust-lang/rfcs/blob/master/text/1445-restrict-constants-in-patterns.md). The primary change is to limit the types of constants used in patterns to those that *derive* `Eq` (note that implementing `Eq` is not sufficient). This has two main effects:
1. Floating point constants are linted, and will eventually be disallowed. This is because floating point constants do not implement `Eq` but only `PartialEq`. This check replaces the existing special case code that aimed to detect the use of `NaN`.
2. Structs and enums must derive `Eq` to be usable within a match.
This is a [breaking-change]: if you encounter a problem, you are most likely using a constant in an expression where the type of the constant is some struct that does not currently implement
`Eq`. Something like the following:
```rust
struct SomeType { ... }
const SOME_CONST: SomeType = ...;
match foo {
SOME_CONST => ...
}
```
The easiest and most future compatible fix is to annotate the type in question with `#[derive(Eq)]` (note that merely *implementing* `Eq` is not enough, it must be *derived*):
```rust
struct SomeType { ... }
const SOME_CONST: SomeType = ...;
match foo {
SOME_CONST => ...
}
```
Another good option is to rewrite the match arm to use an `if` condition (this is also particularly good for floating point types, which implement `PartialEq` but not `Eq`):
```rust
match foo {
c if c == SOME_CONST => ...
}
```
Finally, a third alternative is to tag the type with `#[structural_match]`; but this is not recommended, as the attribute is never expected to be stabilized. Please see RFC #1445 for more details.
cc https://github.com/rust-lang/rust/issues/31434
r? @pnkfelix
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std: Link to gcc_s on NetBSD
Currently the nightlies we're producing fail when linking some C code into a
Rust application with the error message:
libgcc_s.so.1: error adding symbols: DSO missing from command line
By linking `gcc_s` instead of `gcc` this error goes away. I haven't tested this
on NetBSD itself, but should help get the Linux cross-compile image moreso up
and working!
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Previously, the thread name (&str) was converted to a CString in the
new thread, but outside unwind::try, causing a panic to continue into FFI.
This patch changes that behaviour, so that the panic instead happens
in the parent thread (where panic infrastructure is properly set up),
not the new thread.
This could potentially be a breaking change for architectures who don't
support thread names.
Signed-off-by: David Henningsson <diwic@ubuntu.com>
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Add code examples for libstd/time
Fixes #29379.
r? @steveklabnik
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doc: Stdin is not writable
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Rollup of 11 pull requests
- Successful merges: #32404, #32420, #32423, #32425, #32429, #32430, #32431, #32434, #32437, #32441, #32443
- Failed merges:
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doc: small char improvements
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std: Store flowinfo/scope_id in host byte order
Apparently these aren't supposed to be stored in network byte order, so doing so
ends up causing failures when it would otherwise succeed when stored in the host
byte order.
Closes #32424
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Implement Default trait for OsString/OsStr
Fixes #32385
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convert 99.9% of `try!`s to `?`s
The first commit is an automated conversion using the [untry] tool and the following command:
```
$ find -name '*.rs' -type f | xargs untry
```
at the root of the Rust repo.
[untry]: https://github.com/japaric/untry
cc @rust-lang/lang @alexcrichton @brson
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Basic refactoring of HashMap
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Automated conversion using the untry tool [1] and the following command:
```
$ find -name '*.rs' -type f | xargs untry
```
at the root of the Rust repo.
[1]: https://github.com/japaric/untry
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Currently these have non-traditional APIs which take a buffer and report how
much was filled in, but they're not necessarily ergonomic to use. Returning an
iterator which *also* exposes an underlying slice shouldn't result in any
performance loss as it's just a lazy version of the same implementation, and
it's also much more ergonomic!
cc #27784
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Apparently these aren't supposed to be stored in network byte order, so doing so
ends up causing failures when it would otherwise succeed when stored in the host
byte order.
Closes #32424
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Currently the nightlies we're producing fail when linking some C code into a
Rust application with the error message:
libgcc_s.so.1: error adding symbols: DSO missing from command line
By linking `gcc_s` instead of `gcc` this error goes away. I haven't tested this
on NetBSD itself, but should help get the Linux cross-compile image moreso up
and working!
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Just to make sure we don't accidentally break this in the future.
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std: Revert addition of `into_ascii_*` methods
The addition of these methods in #31335 required adding impls of the trait for
the `String` and `Vec<T>` types. This unfortunately caused a regression (#32074)
in type inference for using these methods which the libs team has decided to not
push forward with. These methods were stabilized in #32020 which was intended to
get backported to beta, but the backport hasn't happened just yet. This commit
reverts both the addition and stabilization of these methods.
One proposed method of handling this, in #32076, was to move the methods to an
extra trait to avoid conflicts with type inference. After some discussion,
however, the libs team concluded that we probably want to reevaluate what we're
doing here, so discussion will continue on the tracking issue, #27809.
Closes #32074
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Make AssertRecoverSafe's field public
It's basically the very definition of a newtype, so we might as well
make things easy on people and let them construct and access it
directly.
r? @aturon
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Add an impl for From trait
Converts a u8 slice to a Ipv4Addr
More discussion on this here: https://github.com/rust-lang/rfcs/pull/1498#issuecomment-191921655
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See also #32313.
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Adjustments to the panic hook API
Rename `set_handler` and `take_handler` to `set_hook` and `take_hook` since we're not actually "handling" (i.e. fixing) anything.
Also alter `set_hook` to take a `Box<Fn(&PanicInfo) + 'static + Sync + Send>` rather than a parameterized closure since there's otherwise no easy way to re-register a hook that came from `take_hook`.
cc #30449
r? @aturon
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Refactor call & function handling in trans, enable MIR bootstrap.
Non-Rust and Rust ABIs were combined into a common codepath, which means:
* The ugly `__rust_abi` "clown shoes" shim for C->Rust FFI is gone, fixes #10116.
* Methods, *including virtual ones* support non-Rust ABIs, closes #30235.
* Non-Rust ABIs also pass fat pointers in two arguments; the result should be identical.
* Zero-sized types are never passed as arguments; again, behavior shouldn't change.
Additionally, MIR support for calling intrinsics (through old trans) was implemented.
Alongside assorted fixes, it enabled MIR to launch :rocket: and do a *complete* bootstrap.
To try it yourself, `./configure --enable-orbit` *or* `make RUSTFLAGS="-Z orbit"`.
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Expose the key of Entry variants for HashMap and BTreeMap.
This PR addresses [issue 1541](https://github.com/rust-lang/rfcs/issues/1541) by exposing the key of `HashMap` and `BTreeMap` entry variants. Basic tests are provided.
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Add is_documentation for IPv6
This function returns true if the given IPv6 is reserved for
documentation. Also, reject this block in the is_global check
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It's basically the very definition of a newtype, so we might as well
make things easy on people and let them construct and access it
directly.
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The addition of these methods in #31335 required adding impls of the trait for
the `String` and `Vec<T>` types. This unfortunately caused a regression (#32074)
in type inference for using these methods which the libs team has decided to not
push forward with. These methods were stabilized in #32020 which was intended to
get backported to beta, but the backport hasn't happened just yet. This commit
reverts both the addition and stabilization of these methods.
One proposed method of handling this, in #32076, was to move the methods to an
extra trait to avoid conflicts with type inference. After some discussion,
however, the libs team concluded that we probably want to reevaluate what we're
doing here, so discussion will continue on the tracking issue, #27809.
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