Fix issue #34101
Fix issue #34101: do not track subcontent of type with dtor nor gather flags for untracked content.
(Includes a regression test, which needed to go into `compile-fail/`
due to weaknesses when combining `#[deny(warnings)]` with
`tcx.sess.span_warn(..)`)
Refactor away the prelude injection fold
Instead, just inject `#[prelude_import] use [core|std]::prelude::v1::*;` at the crate root while injecting `extern crate [core|std];` and process `#[no_implicit_prelude]` attributes in `resolve`.
r? @nrc
Support `#[macro_use]` on macro-expanded crates
This PR loads macros from `#[macro_use]` crates during expansion so that
- macro-expanded `#[macro_use]` crates work (fixes#33936, fixes#28071), and
- macros imported from crates have the same scope as macros imported from modules.
This is a [breaking-change]. For example, this will break:
```rust
macro_rules! m {
() => { #[macro_use(foo)] extern crate core; } //~ ERROR imported macro not found
}
m!();
```
Also, this will break:
```rust
macro_rules! try { () => {} }
// #[macro_use] mod bar { macro_rules! try { ... } } //< ... just like this would ...
fn main() { try!(); } //< ... making this an error
```
r? @nrc
trans: don't misuse C_nil for ZSTs other than ().
`C_nil` is actually `C_null` for `()` so `TempRef::new_operand` was treating all ZSTs as `()`.
This should allow running Servo with `RUSTFLAGS=-Zorbit`, assuming there are no other bugs.
The root of the problem is that a string literal pattern is essentially of
the form `&LITERAL`, in a single block, while match checking wants to
split that.
To fix that, I added a type field to the patterns in match checking,
which allows us to distinguish between a full and split pattern.
That file is ugly and needs to be cleaned. However, `trans::_match` calls
it, so I think we should delay the cleanup until we kill that.
Fixes#30240
[MIR] Make scopes debuginfo-specific (visibility scopes).
Fixes#32949 by having MIR (visibility) scopes mimic the lexical structure.
Unlike #33235, this PR also removes all scopes without variable bindings.
Printing of scopes also changed, e.g. for:
```rust
fn foo(x: i32, y: i32) { let a = 0; let b = 0; let c = 0; }
```
Before my changes:
```rust
fn foo(arg0: i32, arg1: i32) -> () {
let var0: i32; // "x" in scope 1 at <anon>:1:8: 1:9
let var1: i32; // "y" in scope 1 at <anon>:1:16: 1:17
let var2: i32; // "a" in scope 3 at <anon>:1:30: 1:31
let var3: i32; // "b" in scope 6 at <anon>:1:41: 1:42
let var4: i32; // "c" in scope 9 at <anon>:1:52: 1:53
...
scope tree:
0 1 2 3 {
4 5
6 {
7 8
9 10 11
}
}
}
```
After my changes:
```rust
fn foo(arg0: i32, arg1: i32) -> () {
scope 1 {
let var0: i32; // "x" in scope 1 at <anon>:1:8: 1:9
let var1: i32; // "y" in scope 1 at <anon>:1:16: 1:17
scope 2 {
let var2: i32; // "a" in scope 2 at <anon>:1:30: 1:31
scope 3 {
let var3: i32; // "b" in scope 3 at <anon>:1:41: 1:42
scope 4 {
let var4: i32; // "c" in scope 4 at <anon>:1:52: 1:53
}
}
}
}
...
}
rustc: Try to contain prepends to PATH
This commit attempts to bring our prepends to PATH on Windows when loading
plugins because we've been seeing quite a few issues with failing to spawn a
process on Windows, the leading theory of which is that PATH is too large as a
result of this. Currently this is mostly a stab in the dark as it's not
confirmed to actually fix the problem, but it's probably not a bad change to
have anyway!
cc #33844Closes#17360
rustdoc: Fix generating redirect pages for statics and consts
These were missing from the cache for some reason meaning the redirect pages failed to render.
Remove the old FOLLOW checking (aka `check_matcher_old`).
It was supposed to be removed at the next release cycle but is still in the tree since like 6 months.
Potential breaking change, since some cases (such as #25658) will change from a warning to an error. But the warning stating that it will be a hard error in the next release has been there for 6 months now.
I think it's safe to break this code. ^_^
trans: always use a memcpy for ABI argument/return casts.
When storing incoming arguments or values returned by call/invoke, always do a `memcpy` from a temporary of the cast type, if there is an ABI cast.
While Clang has gotten smarter ([store](https://godbolt.org/g/EphFuK) vs [memcpy](https://godbolt.org/g/5dikH9)), a `memcpy` will always work.
This is what @dotdash has wanted to do all along, and it fixes#32049.
This was using an invalid iterator so is likely to end with buggy
behaviour.
It also doesn't even benefit many type in std including Vec so removing it
shouldn't cause any problems.
Have included an example of a Cargo.toml file containing the libc dependency.
The file has been reformatted to use sections. The note on the default features warning is part of the _Using libc_ section but is in bold.
