Open
Description
// check-pass
pub fn yes_vec_partial_eq_array<A, B>() -> impl
where
A: PartialEq<B>,
{
Vec::<A>::new()
}
pub fn yes_vec_partial_eq_ref_array<'a, A, B>() -> impl PartialEq<&'a [B; 32]>
where
A: PartialEq<B>,
{
Vec::<&'a mut [B; 32]>::new()
}
pub fn yes_array_into_vec<T>() -> Vec<T> {
[].into()
}
pub fn yes_array_into_box<T>() -> Box<[T]> {
[]
}
use std::collections::VecDeque;
pub fn yes_vecdeque_partial_eq_array<A, B>() -> impl PartialEq<B>
where
A: PartialEq<B>,
{
VecDeque ::<&'a mut [B; 32]>::new()
}
pub fn yes_vecdeque_partial_eq_ref_array<'a, A, B>() -> impl PartialEq<&'a [B; 32]>
where
A: PartialEq<B>,
{
VecDeque::<&'a mut [B; 32]>::new()
}
pub fn yes_vecdeque_partial_eq_ref_mut_array<'a, A, B>() -> impl PartialEq<&'a mut [B; 32]>
where
A: PartialEq<[B; 32]>,
{
VecDeque::<&'a mut [B; 32]>::new()
}
fn main() {}Ztime-passes output
time: 0.001; rss: 45MB -> 49MB ( +4MB) parse_crate
time: 0.004; rss: 53MB -> 69MB ( +16MB) expand_crate
time: 0.004; rss: 53MB -> 69MB ( +16MB) macro_expand_crate
error: at least one trait must be specified
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:3:44
|
3 | pub fn yes_vec_partial_eq_array<A, B>() -> impl
| ^^^^
time: 0.005; rss: 69MB -> 73MB ( +4MB) AST_validation
error[E0261]: use of undeclared lifetime name `'a`
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:31:20
|
27 | pub fn yes_vecdeque_partial_eq_array<A, B>() -> impl PartialEq<B>
| - help: consider introducing lifetime `'a` here: `'a,`
...
31 | VecDeque ::<&'a mut [B; 32]>::new()
| ^^ undeclared lifetime
time: 0.001; rss: 73MB -> 76MB ( +3MB) late_resolve_crate
time: 0.002; rss: 73MB -> 76MB ( +3MB) resolve_crate
time: 0.001; rss: 76MB -> 80MB ( +4MB) misc_checking_1
time: 0.001; rss: 80MB -> 85MB ( +4MB) wf_checking
error[E0277]: can't compare `&mut [B; 32]` with `B`
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:10:52
|
10 | pub fn yes_vec_partial_eq_ref_array<'a, A, B>() -> impl PartialEq<&'a [B; 32]>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `&mut [B; 32] == B`
|
= help: the trait `PartialEq<B>` is not implemented for `&mut [B; 32]`
= note: required for `Vec<&mut [B; 32]>` to implement `PartialEq<&'a [B; 32]>`
help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
|
12 | A: PartialEq<B>, &mut [B; 32]: PartialEq<B>
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0277]: can't compare `VecDeque<&mut [B; 32]>` with `B`
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:27:49
|
27 | pub fn yes_vecdeque_partial_eq_array<A, B>() -> impl PartialEq<B>
| ^^^^^^^^^^^^^^^^^ no implementation for `VecDeque<&mut [B; 32]> == B`
...
31 | VecDeque ::<&'a mut [B; 32]>::new()
| ------------------------------------- return type was inferred to be `VecDeque<&mut [B; 32]>` here
|
= help: the trait `PartialEq<B>` is not implemented for `VecDeque<&mut [B; 32]>`
help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
|
29 | A: PartialEq<B>, VecDeque<&mut [B; 32]>: PartialEq<B>
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0277]: can't compare `&mut [B; 32]` with `B`
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:34:57
|
34 | pub fn yes_vecdeque_partial_eq_ref_array<'a, A, B>() -> impl PartialEq<&'a [B; 32]>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `&mut [B; 32] == B`
|
= help: the trait `PartialEq<B>` is not implemented for `&mut [B; 32]`
= note: required for `VecDeque<&mut [B; 32]>` to implement `PartialEq<&'a [B; 32]>`
help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
|
36 | A: PartialEq<B>, &mut [B; 32]: PartialEq<B>
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error[E0277]: can't compare `&mut [B; 32]` with `B`
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:41:61
|
41 | pub fn yes_vecdeque_partial_eq_ref_mut_array<'a, A, B>() -> impl PartialEq<&'a mut [B; 32]>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `&mut [B; 32] == B`
|
= help: the trait `PartialEq<B>` is not implemented for `&mut [B; 32]`
= note: required for `VecDeque<&mut [B; 32]>` to implement `PartialEq<&'a mut [B; 32]>`
help: consider extending the `where` clause, but there might be an alternative better way to express this requirement
|
43 | A: PartialEq<[B; 32]>, &mut [B; 32]: PartialEq<B>
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
time: 120.775; rss: 85MB -> 2445MB (+2360MB) item_types_checking
error[E0308]: mismatched types
--> /home/matthias/vcs/github/rust6_omni/74/747e8d427cd8043eab8193a8549a36a531ad0563.rs:22:5
|
21 | pub fn yes_array_into_box<T>() -> Box<[T]> {
| -------- expected `Box<[T]>` because of return type
22 | []
| ^^ expected `Box<[T]>`, found `[_; 0]`
|
= note: expected struct `Box<[T]>`
found array `[_; 0]`
= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
help: store this in the heap by calling `Box::new`
|
22 | Box::new([])
| +++++++++ +
time: 0.007; rss: 2445MB -> 2455MB ( +10MB) item_bodies_checking
time: 120.784; rss: 80MB -> 2455MB (+2375MB) type_check_crate
time: 0.093; rss: 2455MB -> 230MB (-2225MB) free_global_ctxt
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0261, E0277, E0308.
For more information about an error, try `rustc --explain E0261`.
time: 120.907; rss: 35MB -> 97MB ( +63MB) total
rustc keeps crunching on it, probably to get further diagnostics. Also note the almost 2.5 gb of memory needed, probably some recursive blowup? 🤔
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