Desugar `yield` in `async gen` correctly, ensure `gen` always returns unit
1. Ensure `async gen` blocks desugar `yield $expr` to `task_context = yield async_gen_ready($expr)`. Previously we were not assigning the `task_context` correctly, meaning that `yield` expressions in async generators returned type `ResumeTy` instead of `()`, and that we were not storing the `task_context` (which is probably unsound if we were reading the old task-context which has an invalidated borrow or something...)
2. Ensure that all `(async?) gen` blocks and `(async?) gen` fns return unit. Previously we were only checking this for `gen fn`, meaning that `gen {}` and `async gen {}` and `async gen fn` were allowed to return values that weren't unit. This is why #119058 was an ICE rather than an E0308.
Fixes#119058.
fix `x clean` for cross-compiled artifacts
```toml
build = "x86_64-unknown-linux-gnu"
host = ["arm-unknown-linux-gnueabihf"]
target = ["arm-unknown-linux-gnueabihf"]
```
On `x86_64-unknown-linux-gnu`, after cross-compiling with the sample configuration above, artifacts under `build/x86_64-unknown-linux-gnu` never gets cleaned with `x clean`. This PR fixes that.
Check `FnPtr`/`FnDef` built-in fn traits correctly with effects
1. Teach the (old) trait solver how to handle the constness for built-in impls of the `Fn*` family of traits. This unfortunately doesn't support const closures just yet.
2. Fix the `const_eval_select`. It turns out that the `where` clause bounds on `const_eval_select` force the effect parameter for both fndefs to be `true` -- with effects, we will leave off any explicit where clauses and register these obligations manually.
I can elaborate on (2.) if you think it needs a better explanation!
r? fee1-dead
This change introduces a new module to StableMIR named `abi` with
information from `rustc_target::abi` and `rustc_abi`, that allow users
to retrieve more low level information required to perform
bit-precise analysis.
The layout of a type can be retrieved via `Ty::layout`, and the instance
ABI can be retrieved via `Instance::fn_abi()`.
To properly handle errors while retrieve layout information, we had
to implement a few layout related traits.
Comment out `change-id` in `config.example.toml`
This way, we only update CONFIG_CHANGE_HISTORY for major changes, which is much simpler (and updating example.toml doesn't make much sense)
r? `@Kobzol` (as this was mainly your idea)
Document unstable linker flags in the unstable book
This PR:
- removes the unstable linker flavors from the stable documentation
- documents the unstable `-C linker-flavor` values in the unstable book (including the ones previously described as stable)
- documents the unstable `-C link-self-contained` components in the unstable book
I don't know if these have some common reviewers, but if not r? `@petrochenkov` as the most knowledgeable person in this area. Please feel free to reassign, I know that you are quite busy.
Fix ICE `ProjectionKinds Deref and Field were mismatched`
Fix#118144
Removed the check that ICEd if the sequence of projection kinds were different across captures. Instead we now sort based only on `Field` projection kinds.
This way, we only update CONFIG_CHANGE_HISTORY for major changes, which is
much simpler (and updating example.toml doesn't make much sense)
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Properly reject `default` on free const items
Fixes#117791.
Technically speaking, this is a breaking change but I doubt it will lead to any real-world regressions (maybe in some macro-trickery crates?). Doing a crater run probably isn't worth it.
Add better ICE messages for some undescriptive panics
Add some better messages at some panics
re: #118955
I took a look at some others but either was not able to figure out what they did, or it was unclear what they should say instead. For example in the query system whether each time a poisoned value is matched upon if they should all just call `FatalError.raise()`
[AIX] Fix XCOFF metadata
#118344 accidentally changed the way to get metadata from XCOFF file and broken our internal CI.
This PR reverts part of #118344 .
coverage: Skip instrumenting a function if no spans were extracted from MIR
The immediate symptoms of #118643 were fixed by #118666, but some users reported that their builds now encounter another coverage-related ICE:
```
error: internal compiler error: compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs:98:17: A used function should have had coverage mapping data but did not: (...)
```
I was able to reproduce at least one cause of this error: if no relevant spans could be extracted from a function, but the function contains `CoverageKind::SpanMarker` statements, then codegen still thinks the function is instrumented and complains about the fact that it has no coverage spans.
This PR prevents that from happening in two ways:
- If we didn't extract any relevant spans from MIR, skip instrumenting the entire function and don't create a `FunctionCoverateInfo` for it.
- If coverage codegen sees a `CoverageKind::SpanMarker` statement, skip it early and avoid creating `func_coverage`.
---
Fixes#118850.
