Skip a test if symlink creation is not possible
If someone running tests on Windows does not have Developer Mode enabled then creating symlinks will fail which in turn would cause this test to fail. This can be a stumbling block for contributors.
BTreeMap::entry: Avoid allocating if no insertion
This PR allows the `VacantEntry` to borrow from an empty tree with no root, and to lazily allocate a new root node when the user calls `.insert(value)`.
Rollup of 5 pull requests
Successful merges:
- #94749 (remove_dir_all: use fallback implementation on Miri)
- #94948 (Fix diagnostics for `#![feature(deprecated_suggestion)]`)
- #94989 (Add Stream alias for AsyncIterator)
- #95108 (Give more details in `Display` for `hir::Target`)
- #95110 (Provide more useful documentation of conversion methods)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Provide more useful documentation of conversion methods
I thought that the documentation for these methods needed to be a bit more explanatory for new users. For advanced users, the comments are relatively unnecessary. I think it would be useful to explain precisely what the method does. As a new user, when you see the `into` method, where the type is inferred, if you are new you don't even know what you convert to, because it is implicit. I believe this can help new users understand.
Give more details in `Display` for `hir::Target`
Made because I was making a code change and got a very confusing "should be applied to a method, not a method" error.
```
error[E0718]: `into_try_type` language item must be applied to a method
--> library\core\src\ops\try_trait.rs:352:32
|
352 | #[cfg_attr(not(bootstrap), lang = "into_try_type")]
| ^^^^^^^^^^^^^^^^^^^^^^ attribute should be applied to a method, not a method
```
With this change the error is more actionable
```
error[E0718]: `into_try_type` language item must be applied to a required trait method
--> library\core\src\ops\try_trait.rs:352:32
|
352 | #[cfg_attr(not(bootstrap), lang = "into_try_type")]
| ^^^^^^^^^^^^^^^^^^^^^^ attribute should be applied to a required trait method, not a provided trait method
```
remove_dir_all: use fallback implementation on Miri
Fixes https://github.com/rust-lang/miri/issues/1966
The new implementation requires `openat`, `unlinkat`, and `fdopendir`. These cannot easily be shimmed in Miri since libstd does not expose APIs corresponding to them. So for now it is probably easiest to just use the fallback code in Miri. Nobody should run Miri as root anyway...
Fix debuginfo tests with GDB 11.2
GDB 11.2 added support for DW_ATE_UTF, which caused some test
failures. This fixes these tests by changing the format that is used,
and adds a new test to verify that characters are emitted as something
that GDB can print in a char-like way.
Fixes#94458
solaris build environment should include libsendfile/liblgrp
As of version 0.2.120 of the libc crate, the solaris target now requires
some additional libraries to be present in the sysroot. Note that the
solaris target doesn't really build against files from Solaris, but
rather against some files from DilOS (a platform similar to both Solaris
and illumos). Pull in the extra libraries and their compilation links
from that apt repository.
This aims to assist with rust-lang/rust#94052.
Update cargo
9 commits in 65c82664263feddc5fe2d424be0993c28d46377a..109bfbd055325ef87a6e7f63d67da7e838f8300b
2022-03-09 02:32:56 +0000 to 2022-03-17 21:43:09 +0000
- Refactor RegistryData::load to handle management of the index cache (rust-lang/cargo#10482)
- Separate VCS command paths with "--" (rust-lang/cargo#10483)
- Fix panic when artifact target is used for `[target.'cfg(<target>)'.dependencies` (rust-lang/cargo#10433)
- Bump git2@0.14.2 and libgit2-sys@0.13.2 (rust-lang/cargo#10479)
- vendor: Don't allow multiple values for --sync (rust-lang/cargo#10448)
- Use types to make clere (credential process || token) (rust-lang/cargo#10471)
- Warning on conflicting keys (rust-lang/cargo#10316)
- Registry functions return Poll to enable parallel fetching of index data (rust-lang/cargo#10064)
- Refine the contributor guide (rust-lang/cargo#10468)
Extend --check-cfg tests to all predicate inside all/any
Now that https://github.com/rust-lang/rust/pull/94295 is merged it's time to add more tests to check that all predicate inside `all` and `any` are always checked.
r? `@petrochenkov`
Re-enable parallel debuginfo tests
Debuginfo tests are serialized due to some older version of LLDB.
However, that comment was last touched in 2014, so presumably these
older versions are long since obsolete.
Partially fixes bug #72719.
Relax tests for Windows dos device names
Windows 11 no longer turn paths ending with dos device names into device paths.
E.g. `C:\path\to\COM1.txt` used to get turned into `\\.\COM1`. Whereas now this path is left as is.
Note though that if the given path is an exact (case-insensitive) match for the string `COM1` then it'll still be converted to `\\.\COM1`.
Add a `process_group` method to UNIX `CommandExt`
- Tracking issue: #93857
- RFC: https://github.com/rust-lang/rfcs/pull/3228
Add a `process_group` method to `std::os::unix::process::CommandExt` that
allows setting the process group id (i.e. calling `setpgid`) in the child, thus
enabling users to set process groups while leveraging the `posix_spawn` fast
path.
Made because I was making a code change and got a very confusing "should be applied to a method, not a method" error.
```
error[E0718]: `into_try_type` language item must be applied to a method
--> library\core\src\ops\try_trait.rs:352:32
|
352 | #[cfg_attr(not(bootstrap), lang = "into_try_type")]
| ^^^^^^^^^^^^^^^^^^^^^^ attribute should be applied to a method, not a method
```
I thought that the documentation for these methods needed to be a bit more explanatory for new users. For advanced users, the comments are relatively unnecessary. I think it would be useful to explain precisely what the method does. As a new user, when you see the `into` method, where the type is inferred, if you are new you don't even know what you convert to, because it is implicit. I believe this can help new users understand.
Rollup of 6 pull requests
Successful merges:
- #92519 (Use verbatim paths for `process::Command` if necessary)
- #92612 (Update stdlib for the l4re target)
- #92663 (Implement `Write for Cursor<[u8; N]>`, plus `A: Allocator` cursor support)
- #93263 (Consistently present absent stdio handles on Windows as NULL handles.)
- #93692 (keyword_docs: document use of `in` with `pub` keyword)
- #94984 (add `CStr` method that accepts any slice containing a nul-terminated string)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
add `CStr` method that accepts any slice containing a nul-terminated string
I haven't created an issue (tracking or otherwise) for this yet; apologies if my approach isn't correct. This is my first code contribution.
This change adds a member fn that converts a slice into a `CStr`; it is intended to be safer than `from_ptr` (which is unsafe and may read out of bounds), and more useful than `from_bytes_with_nul` (which requires that the caller already know where the nul byte is).
The reason I find this useful is for situations like this:
```rust
let mut buffer = [0u8; 32];
unsafe {
some_c_function(buffer.as_mut_ptr(), buffer.len());
}
let result = CStr::from_bytes_with_nul(&buffer).unwrap();
```
This code above returns an error with `kind = InteriorNul`, because `from_bytes_with_nul` expects that the caller has passed in a slice with the NUL byte at the end of the slice. But if I just got back a nul-terminated string from some FFI function, I probably don't know where the NUL byte is.
I would wish for a `CStr` constructor with the following properties:
- Accept `&[u8]` as input
- Scan for the first NUL byte and return the `CStr` that spans the correct sub-slice (see [future note below](https://github.com/rust-lang/rust/pull/94984#issuecomment-1070754281)).
- Return an error if no NUL byte is found within the input slice
I asked on [Zulip](https://rust-lang.zulipchat.com/#narrow/stream/122651-general/topic/CStr.20from.20.26.5Bu8.5D.20without.20knowing.20the.20NUL.20location.3F) whether this sounded like a good idea, and got a couple of positive-sounding responses from ``@joshtriplett`` and ``@AzureMarker.``
This is my first draft, so feedback is welcome.
A few issues that definitely need feedback:
1. Naming. ``@joshtriplett`` called this `from_bytes_with_internal_nul` on Zulip, but after staring at all of the available methods, I believe that this function is probably what end users want (rather than the existing fn `from_bytes_with_nul`). Giving it a simpler name (**`from_bytes`**) implies that this should be their first choice.
2. Should I add a similar method on `CString` that accepts `Vec<u8>`? I'd assume the answer is probably yes, but I figured I'd try to get early feedback before making this change bigger.
3. What should the error type look like? I made a unit struct since `CStr::from_bytes` can only fail in one obvious way, but if I need to do this for `CString` as well then that one may want to return `FromVecWithNulError`. And maybe that should dictate the shape of the `CStr` error type also?
Also, cc ``@poliorcetics`` who wrote #73139 containing similar fns.
