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Soft-destabilize `RustcEncodable` & `RustcDecodable`, remove from prelude in next edition
cc rust-lang/libs-team#272
Any use of `RustcEncodable` and `RustcDecodable` now triggers a deny-by-default lint. The derives have been removed from the 2024 prelude. I specifically chose **not** to document this in the module-level documentation, as the presence in existing preludes is not documented (which I presume is intentional).
This does not implement the proposed change for `rustfix`, which I will be looking into shortly.
With regard to the items in the preludes being stable, this should not be an issue because #15702 has been resolved.
r? libs-api
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Update `RwLock` deadlock example to not use shadowing
Tweak variable names in the deadlock example to remove any potential confusion that the behavior is somehow shadowing-related.
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`UnixStream`: override `read_buf`
Split from #122441
r? ``@workingjubilee``
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std library thread.rs: fix NetBSD code for ILP32 CPUs.
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Unix: Support more platforms with `preadv` and `pwritev`
- `aix`, `dragonfly` and `openbsd` with direct call
- `watchos` with weak linkage
cc #89517
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Tweak variable names in the deadlock example to remove any potential
confusion that the behavior is somehow shadowing-related.
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unix fs: Make hurd using explicit new rather than From
408c0ea2162b ("unix time module now return result") dropped the From impl for SystemTime, breaking the hurd build (and probably the horizon build)
Fixes #123032
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408c0ea2162b ("unix time module now return result") dropped the From
impl for SystemTime, breaking the hurd and horizon builds.
Fixes #123032
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warning: casting raw pointers to the same type and constness is unnecessary (`*mut V` -> `*mut V`)
--> library\alloc\src\collections\btree\map\entry.rs:357:31
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357 | let val_ptr = root.borrow_mut().push(self.key, value) as *mut V;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `root.borrow_mut().push
(self.key, value)`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting to the same type is unnecessary (`usize` -> `usize`)
--> library\alloc\src\ffi\c_str.rs:411:56
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411 | let slice = slice::from_raw_parts_mut(ptr, len as usize);
| ^^^^^^^^^^^^ help: try: `len`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting raw pointers to the same type and constness is unnecessary (`*mut T` -> `*mut T`)
--> library\alloc\src\slice.rs:516:25
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516 | (buf.as_mut_ptr() as *mut T).add(buf.len()),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `buf.as_mut_ptr()`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting raw pointers to the same type and constness is unnecessary (`*mut T` -> `*mut T`)
--> library\alloc\src\slice.rs:537:21
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537 | (buf.as_mut_ptr() as *mut T).add(buf.len()),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `buf.as_mut_ptr()`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting raw pointers to the same type and constness is unnecessary (`*const ()` -> `*const ()`)
--> library\alloc\src\task.rs:151:13
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151 | waker as *const (),
| ^^^^^^^^^^^^^^^^^^ help: try: `waker`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting raw pointers to the same type and constness is unnecessary (`*const ()` -> `*const ()`)
--> library\alloc\src\task.rs:323:13
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323 | waker as *const (),
| ^^^^^^^^^^^^^^^^^^ help: try: `waker`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting to the same type is unnecessary (`usize` -> `usize`)
--> library\std\src\sys_common\net.rs:110:21
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110 | assert!(len as usize >= mem::size_of::<c::sockaddr_in>());
| ^^^^^^^^^^^^ help: try: `len`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
warning: casting to the same type is unnecessary (`usize` -> `usize`)
--> library\std\src\sys_common\net.rs:116:21
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116 | assert!(len as usize >= mem::size_of::<c::sockaddr_in6>());
| ^^^^^^^^^^^^ help: try: `len`
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= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
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std::thread: refine available_parallelism for solaris/illumos.
Rather than the system-wide available cpus fallback solution, we fetch the cpus bound to the current process.
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panic-in-panic-hook: formatting a message that's just a string is risk-free
This slightly improves the output in the 'panic while processing panic' case if the panic message does not involve any formatting. Follow-up to https://github.com/rust-lang/rust/pull/122930.
r? ``@Amanieu``
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Fix build failure on ARM/AArch64/PowerPC/RISC-V FreeBSD/NetBSD
Fixes https://github.com/rust-lang/rust/pull/121881#discussion_r1536764650
Checked targets: aarch64-unknown-freebsd, powerpc64-unknown-freebsd, armv7-unknown-freebsd, riscv64gc-unknown-freebsd, aarch64-unknown-netbsd.
r? ``@Amanieu``
cc ``@devnexen``
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Rather than the system-wide available cpus fallback solution, we fetch
the cpus bound to the current process.
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Expand sys/os for UEFI
- Implement current_exe() and getcwd()
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add panic location to 'panicked while processing panic'
Fixes https://github.com/rust-lang/rust/issues/97181
r? `@Amanieu`
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docs(sync): normalize dot in fn summaries
All other functions in e.g. [`Mutex`](https://doc.rust-lang.org/std/sync/struct.Mutex.html) have a dot at the end of their first doc line, except for the newly stabilized [`Mutex::clear_poison`](https://doc.rust-lang.org/std/sync/struct.Mutex.html#method.clear_poison) (and its friend [`RwLock::clear_poison`](https://doc.rust-lang.org/std/sync/struct.RwLock.html#method.clear_poison)).
This PR remedies that by adding a normalizing dot.
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Replace visibility test with reachability test in dead code detection
Fixes https://github.com/rust-lang/rust/issues/119545
Also included is a fix for an error now flagged by the lint
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std::net: adding acceptfilter feature for netbsd/freebsd.
similar to linux's ext deferaccept, to filter incoming connections before accept.
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Stop using `box PAT` syntax for deref patterns, as it's misleading and
also causes their semantics being tangled up.
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Relax SeqCst ordering in standard library.
Every single SeqCst in the standard library is unnecessary. In all cases, Relaxed or Release+Acquire was sufficient.
As I [wrote](https://marabos.nl/atomics/memory-ordering.html#common-misconceptions) in my book on atomics:
> [..] when reading code, SeqCst basically tells the reader: "this operation depends on the total order of every single SeqCst operation in the program," which is an incredibly far-reaching claim. The same code would likely be easier to review and verify if it used weaker memory ordering instead, if possible. For example, Release effectively tells the reader: "this relates to an acquire operation on the same variable," which involves far fewer considerations when forming an understanding of the code.
>
> It is advisable to see SeqCst as a warning sign. Seeing it in the wild often means that either something complicated is going on, or simply that the author did not take the time to analyze their memory ordering related assumptions, both of which are reasons for extra scrutiny.
r? ````@Amanieu```` ````@joboet````
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similar to linux's ext deferaccept, to filter incoming connections
before accept.
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Relaxed is enough here. Synchronization is done by the mutex.
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Relaxed memory ordering is fine because spawn()/join() already provides
all the synchronization we need.
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Relaxed is enough to have fetch_add(1) return each value only once
(until it wraps around).
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SeqCst isn't necessary in any of these cases.
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Bump to 1.78 bootstrap compiler
https://forge.rust-lang.org/release/process.html#master-bootstrap-update-t-2-day-tuesday
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Add "put" as a confusable for insert on hash map/set
Already a confusable on btree map/set.
Java's `Map` calls the insert method `put`: https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Map.html#put(K,V)
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Expose `ucred::peer_cred` on QNX targets to enable dist builds
After following https://doc.rust-lang.org/rustc/platform-support/nto-qnx.html I attempted to run the following `x.py` command:
```bash
export build_env='
CC_aarch64-unknown-nto-qnx710=qcc
CFLAGS_aarch64-unknown-nto-qnx710=-Vgcc_ntoaarch64le_cxx
CXX_aarch64-unknown-nto-qnx710=qcc
AR_aarch64_unknown_nto_qnx710=ntoaarch64-ar
CC_x86_64-pc-nto-qnx710=qcc
CFLAGS_x86_64-pc-nto-qnx710=-Vgcc_ntox86_64_cxx
CXX_x86_64-pc-nto-qnx710=qcc
AR_x86_64_pc_nto_qnx710=ntox86_64-ar'
env $build_env ./x.py --stage 2 dist rust-std --target aarch64-unknown-nto-qnx710,x86_64-pc-nto-qnx710,x86_64-unknown-linux-gnu
```
The result was the following error:
```
Compiling object v0.32.2
Compiling std_detect v0.1.5 (/home/ana/git/rust-lang/rust/library/stdarch/crates/std_detect)
Compiling addr2line v0.21.0
error: function `peer_cred` is never used
--> library/std/src/os/unix/net/ucred.rs:89:12
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89 | pub fn peer_cred(socket: &UnixStream) -> io::Result<UCred> {
| ^^^^^^^^^
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= note: `-D dead-code` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(dead_code)]`
error: could not compile `std` (lib) due to 1 previous error
Build completed unsuccessfully in 0:06:25
```
I contacted `@flba-eb` and `@gh-tr` over email and we confirmed that `peer_cred` here should be flagged on `nto` targets. This should enable the clean `x.py --stage 2 dist rust-std` command on these platforms.
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Signed-off-by: onur-ozkan <work@onurozkan.dev>
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The SeqCst wasn't synchronizing with anything. Relaxed is enough.
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SeqCst is unnecessary. Release+Acquire is the right ordering for a
mutex.
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Relaxed is enough to ensure fetch_add(1) returns each integer exactly
once.
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