Add support for test suites emulated in QEMU
This commit adds support to the build system to execute test suites that cannot
run natively but can instead run inside of a QEMU emulator. A proof-of-concept
builder was added for the `arm-unknown-linux-gnueabihf` target to show off how
this might work.
In general the architecture is to have a server running inside of the emulator
which a local client connects to. The protocol between the server/client
supports compiling tests on the host and running them on the target inside the
emulator.
Closes#33114
Improve error message for uninferrable types #38812
Hello,
I tried to improve the error message for uninferrable types. The error code is `E0282`.
```rust
error[E0282]: type annotations needed
--> /home/cengizIO/issue38812.rs:2:11
|
2 | let x = vec![];
| - ^^^^^^ cannot infer type for `T`
| |
| consider giving `x` a type
|
= note: this error originates in a macro outside of the current crate
```
and
```rust
error[E0282]: type annotations needed
--> /home/cengizIO/issue38812.rs:2:15
|
2 | let (x,) = (vec![],);
| ---- ^^^^^^ cannot infer type for `T`
| |
| consider giving a type to pattern
|
= note: this error originates in a macro outside of the current crate
```
Rust compiler now tries to find uninferred `local`s with type `_` and adds them into the error message.
I'm probably wrong on wording that I used. Please feel free to suggest better alternatives.
Thanks @nikomatsakis for mentoring 🍺
Any comments/feedback is more than welcome!
Thank you
make lifetimes that only appear in return type early-bound
This is the full and proper fix for #32330. This also makes some effort to give a nice error message (as evidenced by the `ui` test), sending users over to the tracking issue for a fuller explanation and offering a `--explain` message in some cases.
This needs a crater run before we land.
r? @arielb1
This is the full and proper fix for #32330. This also makes some effort
to give a nice error message (as evidenced by the `ui` test), sending
users over to the tracking issue for a full explanation.
ignore more gdb versions with buggy rust support
This extends the versions of gdb which were ignored in #39039. While just ignoring gdb versions up to 7.12.1 would have been sufficient for now, I believe (after consulting https://sourceware.org/gdb/wiki/Internals%20Versions) that ignoring versions up to 7.12.9 will prevent the tests failing again for 7.12.2, etc. while still running all tests for the development versions of gdb (which will be >= 7.12.10 as far as I can tell).
This should fix#39522.
cc @Manishearth, @michaelwoerister, #38948
Uninhabited while-let pattern fix
This fix makes it so while-let with an unsatisfiable pattern raises a correct warning rather than an incorrect error.
Don't suggest to use things which weren't found either
Fixes#38054
The best code I can come up with, suggestions are welcome.
Basically, removing ```. Did you mean to use `DoesntExist1`?``` in the code below, because it is useless.
```rust
error[E0432]: unresolved import `DoesntExist1`
--> src/lib.rs:1:5
|
1 | use DoesntExist1;
| ^^^^^^^^^^^^ no `DoesntExist1` in the root
error[E0432]: unresolved import `DoesntExist2`
--> src/lib.rs:2:5
|
2 | use DoesntExist2;
| ^^^^^^^^^^^^ no `DoesntExist2` in the root. Did you mean to use `DoesntExist1`?
```
Expand derive macros in the MacroExpander
This removes the expand_derives function, and sprinkles the functionality throughout the Invocation Collector, Expander and Resolver.
Fixes https://github.com/rust-lang/rust/issues/39326
r? @jseyfried
Add warning for () to ! switch
With feature(never_type) enabled diverging type variables will default to `!` instead of `()`. This can cause breakages where a trait is resolved on such a type.
This PR emits a future-compatibility warning when it sees this happen.
Add 128-bit atomics
This is currently only supported on AArch64 since that is the only target which unconditionally supports 128-bit atomic operations.
cc #35118
rustdoc: fix doctests with non-feature crate attrs
Fixes#38129.
The book says that any top-level crate attributes at the beginning of a doctest are moved outside the generated `fn main`, but it was only checking for `#![feature`, not `#![`.
These attributes previously caused warnings but were then ignored, so in theory this could change the behavior of doctests in the wild.
Remove attr-variant-data.rs since it relies on quirks
in legacy custom derive resolution (undefined derives
only print a warning).
Add a new test which uses a defined proc macro derive,
and tests pretty printing of proc macro derive
attributes.
Implement kind="static-nobundle" (RFC 1717)
This implements the "static-nobundle" library kind (last item from #37403).
Rustc handles "static-nobundle" libs very similarly to dylibs, except that on Windows, uses of their symbols do not get marked with "dllimport". Which is the whole point of this feature.
Previously, the note/message for the source of a lint being the command
line unconditionally named the individual lint, even if the actual
command specified a lint group (e.g., `-D warnings`); here, we take note
of the actual command options so we can be more specific.
This remains in the matter of #36846.
Warning or error messages set via a lint group attribute
(e.g. `#[deny(warnings)]`) should still make it clear which individual
lint (by name) was triggered, similarly to how we include "on by
default" language for default lints. This—and, while we're here, the
existing "on by default" language—can be tucked into a note rather than
cluttering the main error message. This occasions the slightest of
refactorings (we now have to get the diagnostic-builder with the main
message first, before matching on the lint source).
This is in the matter of #36846.
Add clearer error message using `&str + &str`
This is the first part of #39018. One of the common things for new users
coming from more dynamic languages like JavaScript, Python or Ruby is to
use `+` to concatenate strings. However, this doesn't work that way in
Rust unless the first type is a `String`. This commit adds a check for
this use case and outputs a new error as well as a suggestion to guide
the user towards the desired behavior. It also adds a new test case to
test the output of the error.
Privatize constructors of tuple structs with private fields
This PR implements the strictest version of such "privatization" - it just sets visibilities for struct constructors, this affects everything including imports.
```
visibility(struct_ctor) = min(visibility(struct), visibility(field_1), ..., visibility(field_N))
```
Needs crater run before proceeding.
Resolves https://github.com/rust-lang/rfcs/issues/902
r? @nikomatsakis
Fix backtraces on i686-pc-windows-gnu by disabling FPO
This might have performance implications. But do note that MSVC
disables FPO by default nowadays and it's use is limited in exception
heavy languages like C++.
See discussion in: #39234Closes: #28218
