incr.comp.: Fix two problems with HIR hashing.
Fixes https://github.com/rust-lang/rust/issues/45469.
This PR fixes two small problems:
* Overflow checks are always enabled in a constant context, so we need to hash spans of potentially overflowing operations. (Eventually I'd like to handle spans differently so we don't have to make HIR hashing know so much about things like this.)
* The HIR map collector had a bug where it would assign the `DepNode::Hir` instead of the corresponding `DepNode::HirBody` in some nested contexts.
r? @nikomatsakis
Fix duplicate display of error E0502
Ref. Repeated "mutable/immutable borrow" error messages #42106.
This PR modifies the return type of [`report_error_if_loan_conflicts_with_restriction`](0f0f5db465/src/librustc_borrowck/borrowck/check_loans.rs (L398-L403)) so the result can be checked in [`report_error_if_loans_conflict`](0f0f5db465/src/librustc_borrowck/borrowck/check_loans.rs (L377-L396)). This is done to prevent displaying a duplicate of the error message E0502 which is referenced in #42106.
The output of compiling:
```rust
fn do_something<T>(collection: &mut Vec<T>) {
let _a = &collection;
collection.swap(1, 2);
}
fn main() {}
```
is now
```bash
$ rustc src/test/compile-fail/issue-42106.rs
error[E0502]: cannot borrow `*collection` as mutable because `collection` is also borrowed as immutable
--> src/test/compile-fail/issue-42106.rs:13:5
|
12 | let _a = &collection;
| ---------- immutable borrow occurs here
13 | collection.swap(1, 2);
| ^^^^^^^^^^ mutable borrow occurs here
14 | }
| - immutable borrow ends here
error: aborting due to 2 previous errors
```
r? @estebank
Improve std::process module docs
Addresses part of #29370
I've changed the first `cat` example to a "Hello World" example involving echo, and I've also added another example showing how to pipe output. I'm still working on the module-level description.
For now, I'd like feedback on the examples.
r? @steveklabnik
Update the book for a fix to the print button
Fixes#45552.
Brings in recent improvements in the text that we've made recently as well.
r? @steveklabnik
ci: Upgrade Android SDK/NDK and refactor to use sdkmanager/avdmanager.
* SDK tools is upgraded to 27.0.0.
* Stopped using the deprecated `android` tool, instead use the recommended `sdkmanager` and `avdmanager`.
* NDK is upgrade to r15c.
The r15 series [dropped support for android-9](https://github.com/android-ndk/ndk/wiki/Changelog-r15) (2.3 / Gingerbread), the minimal supported version is now android-14 (4.0 / Ice Cream Sandwich).
r? @alexcrichton
(WIP, haven't confirmed if the change really works yet)
* SDK tools is upgraded to 27.0.0.
- Refactored to use `sdkmanager`/`avdmanager` instead of the deprecated
`android` tool.
* The Java version used by Android SDK is downgraded to OpenJDK-8, in order
to download the SDK through HTTPS.
* NDK is upgrade to r15c.
- Dropped support for android-9 (2.3 / Gingerbread), the minimal
supported version is now android-14 (4.0 / Ice Cream Sandwich).
- Changed the default Android compiler from GCC to clang.
- For details of change introduced by NDK r15, see
https://github.com/android-ndk/ndk/wiki/Changelog-r15.
Avoid repetition on “use of unstable library feature 'rustc_private'”
This PR fixes the error by only emitting it when the span contains a real file (is not inside a macro) - and making sure it's emitted only once per span.
The first check was needed because spans-within-macros seem to differ a lot and "fixing" them to the real location is not trivial (and the method that does this is private to another module). It also feels like there always will be an error on import, with the real file name, so not sure there's a point to re-emit the same error at macro use.
Fix#44953.
