When these `Box<Generics>` types were introduced,
`Generics` was made with `Vec` and much larger.
Now that it's made with `ThinVec`, `Type` is bigger
and should be boxed instead.
On Windows make `read_dir` error on the empty path
This makes Windows consistent with other platforms. Note that this should not be taken to imply any decision on #114149 has been taken. However it was felt that while there is a lack of libs-api consensus, we should be consistent across platforms in the meantime.
This is a change in behaviour for Windows so will also need an fcp before merging.
r? libs-api
When installing Python from the Windows Store, a copy of `python.exe` is
installed inder the Microsoft directory in the user's local AppData
directory. Currently, `x.ps1` checks for this file, because by default
running `python.exe` opens a link to the Microsoft Store rather than
running Python.
Once the user installs Python, however, this contains a valid
interpreter. Unfortuantely, `x.ps1` can't tell the difference between a
legitimate Python install and the stub.
Remove the check, as it makes it impossible to use the official version
from Microsoft once it has been installed.
Signed-off-by: Sean Cross <sean@xobs.io>
Use beta cargo in opt-dist
Using the new stage2 cargo caused issues when a backwards-incompatible change was made to cargo. This means that we won't be testing the LTO/1-CGU optimized cargo, but I don't think that's a big issue, as we primarily want to test the compiler.
Should fix [this](https://github.com/rust-lang/rust/pull/117000#issuecomment-1773639109) failure.
Most coverage metadata is encoded into two sections in the final executable.
The `__llvm_covmap` section mostly just contains a list of filenames, while the
`__llvm_covfun` section contains encoded coverage maps for each instrumented
function.
The catch is that each per-function record also needs to contain a hash of the
filenames list that it refers to. Historically this was handled by assembling
most of the per-function data into a temporary list, then assembling the
filenames buffer, then using the filenames hash to emit the per-function data,
and then finally emitting the filenames table itself.
However, now that we build the filenames table up-front (via a separate
traversal of the per-function data), we can hash and emit that part first, and
then emit each of the per-function records immediately after building. This
removes the awkwardness of having to temporarily store nearly-complete
per-function records.
The main change here is that `VirtualFileMapping` now uses an internal hashmap
to de-duplicate incoming global file IDs. That removes the need for
`encode_mappings_for_function` to re-sort its mappings by filename in order to
de-duplicate them.
(We still de-duplicate runs of identical filenames to save work, but this is
not load-bearing for correctness, so a sort is not necessary.)
The combined `get_expressions_and_counter_regions` method was an artifact of
having to prepare the expressions and mappings at the same time, to avoid
ownership/lifetime problems with temporary data used by both.
Now that we have an explicit transition from `FunctionCoverageCollector` to the
final `FunctionCoverage`, we can prepare any shared data during that step and
store it in the final struct.
This gives us a clearly-defined place to run code after the instance's MIR has
been traversed by codegen, but before we emit its `__llvm_covfun` record.
Rollup of 4 pull requests
Successful merges:
- #116985 (Use gdb.ValuePrinter tag class)
- #116989 (Skip test if Unix sockets are unsupported)
- #117034 (Don't crash on empty match in the `nonexhaustive_omitted_patterns` lint)
- #117037 (rustdoc book doc example error)
r? `@ghost`
`@rustbot` modify labels: rollup
rustdoc book doc example error
closes#117036
This is the minimal change required to make the second what-to-include.md example valid.
Another more modern solution could be considered:
```
/// Example
/// ```rust
/// let fortytwo = "42".parse::<u32>()?;
/// println!("{} + 10 = {}", fortytwo, fortytwo+10);
/// # Ok::<(), <u32 as std::str::FromStr>::Err>(())
/// ```
```
