Remove "execute" bit from lock file permissions
Previously, flock would set the "execute" bit on Rust lock files. That makes no sense.
This patch clears the "execute" bit on Rust lock files.
See issue #102531.
Rollup of 4 pull requests
Successful merges:
- #102454 (Suggest parentheses for possible range method calling)
- #102466 (only allow `ConstEquate` with `feature(gce)`)
- #102945 (Do not register placeholder `RegionOutlives` obligations when `considering_regions` is false)
- #103091 (rustdoc: remove unused HTML class `sidebar-title`)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Do not register placeholder `RegionOutlives` obligations when `considering_regions` is false
**NOTE:** I'm kinda just putting this up for discussion. I'm not certain this is correct...?
This was introduced in [`608625d`](608625dae9 (diff-6e54b18681342ec725d75591dbf384ad08cd73df29db00485fe51b4e90f76ff7R361)).
Interestingly, we only check `data.has_placeholders()` for `RegionOutlives`, and not for `TypeOutlives`... why? For the record, that different treatment between `RegionOutlives` and `TypeOutlives` is why the fix "The compiling succeeds when all `'a : 'b` are replaced with `&'a () : 'b`" in #100689 _"works"_, but it seems like an implementation detail considering this.
Also, why do we care about placeholder regions being registered if `considering_regions` is false? It doesn't seem to affect any UI tests, for example.
r? `@lcnr`
Fixes#102899Fixes#100689
Rollup of 5 pull requests
Successful merges:
- #103087 (Documentation BTreeMap::append's behavior for already existing keys)
- #103089 (Mark derived StructuralEq as automatically derived.)
- #103102 (Clarify the possible return values of `len_utf16`)
- #103109 (PhantomData: inline a macro that is used only once)
- #103120 (rustdoc: Do not expect `doc(primitive)` modules to always exist)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Fix subst issues with return-position `impl Trait` in trait
1. Fix an issue where we were rebase impl substs onto trait method substs, instead of trait substs
2. Fix an issue where early-bound regions aren't being mapped correctly for RPITIT hidden types
Fixes#102301Fixes#102310Fixes#102334Fixes#102918
Fix missing explanation of where the borrowed reference is used when the same borrow occurs multiple times due to loop iterations
Fix#99824.
Problem of the issue:
If a borrow occurs in a loop, the borrowed reference could be invalidated at the same place at next iteration of the loop. When this happens, the point where the borrow occurs is the same as the intervening point that might invalidate the reference in the loop. This causes a problem for the current code finding the point where the resulting reference is used, so that the explanation of the cause will be missing. As the second point of "explain all errors in terms of three points" (see [leveraging intuition framing errors in terms of points"](https://rust-lang.github.io/rfcs/2094-nll.html#leveraging-intuition-framing-errors-in-terms-of-points), this explanation is very helpful for user to understand the error.
In the current implementation, the searching region for finding the location where the borrowed reference is used is limited to between the place where the borrow occurs and the place where the reference is invalidated. If those two places happen to be the same, which indicates that the borrow and invalidation occur at the same place in a loop, the search will fail.
One solution to the problem is when these two places are the same, find the terminator of the loop, and then use the location of the loop terminator instead of the location of the borrow for the region to find the place where the borrowed reference is used.
pretty: fix to print some lifetimes on HIR pretty-print
HIR pretty-printer doesn't seem to print some lifetimes in types. This PR fixes that.
Closes https://github.com/rust-lang/rust/issues/85089
Get rid of `rustc_query_description!`
**I am not entirely sure whether this is an improvement and would like to get your feedback on it.**
Helps with #96524.
Queries can provide an arbitrary expression for their description and their caching behavior. Before, these expressions where stored in a `rustc_query_description` macro emitted by the `rustc_queries` macro, and then used in `rustc_query_impl` to fill out the methods for the `QueryDescription` trait.
Instead, we now emit two new modules from `rustc_queries` containing the functions with the expressions. `rustc_query_impl` calls these functions now instead of invoking the macro.
Since we are now defining some of the functions in `rustc_middle::query`, we now need all the imports for the key types mthere as well.
r? `@cjgillot`
Rollup of 6 pull requests
Successful merges:
- #102773 (Use semaphores for thread parking on Apple platforms)
- #102884 (resolve: Some cleanup, asserts and tests for lifetime ribs)
- #102954 (Add missing checks for `doc(cfg_hide(...))`)
- #102998 (Drop temporaries created in a condition, even if it's a let chain)
- #103003 (Fix `suggest_floating_point_literal` ICE)
- #103041 (Update cargo)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Drop temporaries created in a condition, even if it's a let chain
Fixes#100513.
During the lowering from AST to HIR we wrap expressions acting as conditions in a `DropTemps` expression so that any temporaries created in the condition are dropped after the condition is executed. Effectively this means we transform
```rust
if Some(1).is_some() { .. }
```
into (roughly)
```rust
if { let _t = Some(1).is_some(); _t } { .. }
```
so that if we create any temporaries, they're lifted into the new scope surrounding the condition, so for example something along the lines of
```rust
if { let temp = Some(1); let _t = temp.is_some(); _t }.
```
Before this PR, if the condition contained any let expressions we would not introduce that new scope, instead leaving the condition alone. This meant that in a let-chain like
```rust
if get_drop("first").is_some() && let None = get_drop("last") {
println!("second");
} else { .. }
```
the temporary created for `get_drop("first")` would be lifted into the _surrounding block_, which caused it to be dropped after the execution of the entire `if` expression.
After this PR, we wrap everything but the `let` expression in terminating scopes. The upside to this solution is that it's minimally invasive, but the downside is that in the worst case, an expression with `let` exprs interspersed like
```rust
if get_drop("first").is_some()
&& let Some(_a) = get_drop("fifth")
&& get_drop("second").is_some()
&& let Some(_b) = get_drop("fourth") { .. }
```
gets _multiple_ new scopes, roughly
```rust
if { let _t = get_drop("first").is_some(); _t }
&& let Some(_a) = get_drop("fifth")
&& { let _t = get_drop("second").is_some(); _t }
&& let Some(_b) = get_drop("fourth") { .. }
```
so instead of all of the temporaries being dropped at the end of the entire condition, they will be dropped right after they're evaluated (before the subsequent `let` expr). So while I'd say the drop behavior around let-chains is _less_ surprising after this PR, it still might not exactly match what people might expect.
For tests, I've just extended the drop order tests added in #100526. I'm not sure if that's the best way to go about it, though, so suggestions are welcome.
Add missing checks for `doc(cfg_hide(...))`
Part of #43781.
The `doc(cfg_hide(...))` attribute can only be used at the crate level and takes a list of attributes as argument.
r? ```@Manishearth```
Make `dyn*` casts into a coercion, allow `dyn*` upcasting
I know that `dyn*` is likely not going to be a feature exposed to surface Rust, but this makes it slightly more ergonomic to write tests for these types anyways. ... and this was just fun to implement anyways.
1. Make `dyn*` into a coercion instead of a cast
2. Enable `dyn*` upcasting since we basically get it for free
3. Simplify some of the cast checking code since we're using the coercion path now
r? `@eholk` but feel free to reassign
cc `@nikomatsakis` and `@tmandry` who might care about making `dyn*` casts into a coercion
Correctly handle path stability for 'use tree' items
PR #95956 started checking the stability of path segments.
However, this was not applied to 'use tree' items
(e.g. 'use some::path::{ItemOne, ItemTwo}') due to the way
that we desugar these items in HIR lowering.
This PR modifies 'use tree' lowering to preserve resolution
information, which is needed by stability checking.
Queries can provide an arbitrary expression for their description and
their caching behavior. Before, these expressions where stored in a
`rustc_query_description` macro emitted by the `rustc_queries` macro,
and then used in `rustc_query_impl` to fill out the methods for the
`QueryDescription` trait.
Instead, we now emit two new modules from `rustc_queries` containing the
functions with the expressions. `rustc_query_impl` calls these functions
now instead of invoking the macro.
Since we are now defining some of the functions in
`rustc_middle::query`, we now need all the imports for the key types
there as well.
