Rollup of 12 pull requests #73864
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Rollup of 12 pull requests #73864
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Make it possible to customize the location of musl libdir using musl-libdir in config.toml, e.g., to use lib64 instead of lib.
I know very little about rust, so I saw this example and tried to generalize it by writing,
```
let layout = Layout::new::<T>();
let new_obj = unsafe {
let ptr = alloc(layout) as *mut T;
*ptr = obj;
Box::from_raw(ptr)
};
```
for some more complicated `T`, which ended up crashing with SIGSEGV,
because it tried to `drop_in_place` the previous object in `ptr` which is
of course garbage. I also added a comment that explains why `.write`
is used, but I think adding that comment is optional and may be too verbose
here. I do however think that changing this example is a good idea to
suggest the correct generalization. `.write` is also used in most of the rest
of the documentation here, even if the example is `i32`, so it would additionally
be more consistent.
update master
Fixes rust-lang#67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display *some* named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`.
This commit moves the compiler-builtins-specific build logic from `src/bootstrap/bin/rustc.rs` into the workspace `Cargo.toml`'s `[profile]` configuration. Now that rust-lang/cargo#7253 is fixed we can ensure that Cargo knows about debug assertions settings, and it can also be configured to specifically disable debug assertions unconditionally for compiler-builtins. This should improve rebuild logic when debug-assertions settings change and also improve build-std integration where Cargo externally now has an avenue to learn how to build compiler-builtins as well.
…g-assertions, r=Mark-Simulacrum rustbuild: Move compiler-builtins build logic to manifest This commit moves the compiler-builtins-specific build logic from `src/bootstrap/bin/rustc.rs` into the workspace `Cargo.toml`'s `[profile]` configuration. Now that rust-lang/cargo#7253 is fixed we can ensure that Cargo knows about debug assertions settings, and it can also be configured to specifically disable debug assertions unconditionally for compiler-builtins. This should improve rebuild logic when debug-assertions settings change and also improve build-std integration where Cargo externally now has an avenue to learn how to build compiler-builtins as well.
bootstrap: Configurable musl libdir Make it possible to customize the location of musl libdir using musl-libdir in config.toml, e.g., to use lib64 instead of lib.
Update Box::from_raw example to generalize better
I know very little about rust, so I saw the example here
```
use std::alloc::{alloc, Layout};
unsafe {
let ptr = alloc(Layout::new::<i32>()) as *mut i32;
*ptr = 5;
let x = Box::from_raw(ptr);
}
```
and tried to generalize it by writing,
```
let layout = Layout::new::<T>();
let new_obj = unsafe {
let ptr = alloc(layout) as *mut T;
*ptr = obj;
Box::from_raw(ptr)
};
```
for some more complicated `T`, which ended up crashing with SIGSEGV,
because it tried to `drop_in_place` the previous object in `ptr` which is
of course garbage. I think that changing this example to use `.write` instead
would be a good idea to suggest the correct generalization. It is also more
consistent with other documentation items in this file, which use `.write`.
I also added a comment to explain it, but I'm not too attached to that,
and can see it being too verbose in this place.
…sKalbertodt Document the static keyword Partial fix of rust-lang#34601. This documents the `static` keyword. It's basically a simplified version of the reference with more examples. @rustbot modify labels: T-doc,C-enhancement
…LukasKalbertodt Remap Windows ERROR_INVALID_PARAMETER to ErrorKind::InvalidInput from Other I don't know if this is acceptable or how likely it is to break existing code, but it seem to me ERROR_INVALID_PARAMETER "The parameter is incorrect" should map to ErrorKind::InvalidInput "A parameter was incorrect". Previously this value fell through to ErrorKind::Other. I can't speak for anyone but myself, but I instinctively thought it would be InvalidInput.
Document the type keyword Partial fix of rust-lang#34601. Two small examples, one clarifying that `type` only defines an alias, not a completely new type, the other explaining the use in traits. @rustbot modify labels: T-doc,C-enhancement
…upper, r=estebank Use an 'approximate' universal upper bound when reporting region errors Fixes rust-lang#67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display *some* named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`.
ast_pretty: Pass some token streams and trees by reference Salvaged from an intermediate version of rust-lang#73345.
…bank
Fix wording for anonymous parameter name help
```
--> exercises/functions/functions2.rs:8:15
|
8 | fn call_me(num) {
| ^ expected one of `:`, `@`, or `|`
|
= note: anonymous parameters are removed in the 2018 edition (see RFC 1685)
help: if this is a `self` type, give it a parameter name
|
8 | fn call_me(self: num) {
| ^^^^^^^^^
help: if this was a parameter name, give it a type
|
8 | fn call_me(num: TypeName) {
| ^^^^^^^^^^^^^
help: if this is a type, explicitly ignore the parameter name
|
8 | fn call_me(_: num) {
|
```
This commit changes "if this was a parameter name" to "if this is a parameter name" to match the wording of similar errors.
…-morse Some refactoring around intrinsic type checking So... This PR went a bit overboard. I wanted to make the `rustc_peek` intrinsic safe (cc @ecstatic-morse ), and remembered a long-standing itch of mine. So I made that huge `&str` match for the intrinsic name a match on `Symbol`s (so basically `u32`s). This is unlikely to have a positive perf effect, even if it likely has better codegen (intrinsics are used rarely, mostly once in their wrapper), so it's mostly a consistency thing since other places actually match on the symbol name of the intrinsics.
…nishearth Split and expand nonstandard-style lints unicode unit test. RFC 2457 requested that the `nonstandard_style` series of linted be adjusted to cover the non_ascii_identifier case. However when i read the code of those implementations, it seems they're already supporting non_ascii_identifiers. But the exact rules is a little different than what's proposed in RFC 2457. So I splitted and expanded the existing test case to try to exercise every branch in the code. I think it'll also be easier to examine the cases in these unit tests to see whether it's ok to just leave them as is, or some adjustments are needed. r? @Manishearth
…Simulacrum Remove defunct `-Z print-region-graph`
|
📌 Commit 339aee7 has been approved by |
bors
added
the
S-waiting-on-bors
|
⌛ Testing commit 339aee7 with merge 630b72e9802d246f9f08fffc39f47e62553349cf... |
|
💥 Test timed out |
bors
added
S-waiting-on-review
|
Gonna let the rollup=never PRs filter out before trying again |
This was referenced Jun 30, 2020
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Successful merges:
-Z print-region-graph#73841 (Remove defunct-Z print-region-graph)Failed merges:
r? @ghost