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Rollup const generics-related PRs #601
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=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `46511`
--> /home/runner/work/glacier/glacier/ices/46511.rs:1:1
|
1 | / struct Foo<'a>
2 | | {
3 | | a: [u8; std::mem::size_of::<&'a mut u8>()]
4 | | }
| |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/46511.rs`
error[E0658]: a non-static lifetime is not allowed in a `const`
--> /home/runner/work/glacier/glacier/ices/46511.rs:3:34
|
3 | a: [u8; std::mem::size_of::<&'a mut u8>()]
| ^^
|
= note: see issue #44580 <rust-lang/rust#44580> for more information
= help: add `#![feature(const_generics)]` to the crate attributes to enable
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0601, E0658.
For more information about an error, try `rustc --explain E0601`.
==============
=== stdout ===
=== stderr ===
error: generic `Self` types are currently not permitted in anonymous constants
--> /home/runner/work/glacier/glacier/ices/47814.rs:8:32
|
8 | pub fn to_buffer() -> [u8; Self::LENGTH] {
| ^^^^^^^^^^^^
|
note: not a concrete type
--> /home/runner/work/glacier/glacier/ices/47814.rs:5:10
|
5 | impl<'a> ArpIPv4<'a> {
| ^^^^^^^^^^^
error: aborting due to previous error
==============
=== stdout === === stderr === error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/51892.rs:12:41 | 12 | type Type = [u8; std::mem::size_of::<<T as Trait>::Type>()]; | ^ cannot perform const operation using `T` | = note: type parameters may not be used in const expressions = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes --> /home/runner/work/glacier/glacier/ices/51892.rs:1:12 | 1 | #![feature(specialization)] | ^^^^^^^^^^^^^^ | = note: `#[warn(incomplete_features)]` on by default = note: see issue #31844 <rust-lang/rust#31844> for more information = help: consider using `min_specialization` instead, which is more stable and complete error[E0601]: `main` function not found in crate `51892` --> /home/runner/work/glacier/glacier/ices/51892.rs:1:1 | 1 | / #![feature(specialization)] 2 | | 3 | | pub trait Trait { 4 | | type Type; ... | 12 | | type Type = [u8; std::mem::size_of::<<T as Trait>::Type>()]; 13 | | } | |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/51892.rs` error: aborting due to 2 previous errors; 1 warning emitted For more information about this error, try `rustc --explain E0601`. ==============
=== stdout ===
=== stderr ===
error: generic `Self` types are currently not permitted in anonymous constants
--> /home/runner/work/glacier/glacier/ices/52808.rs:6:20
|
6 | fn foo(_: [u8; Self::X]) {}
| ^^^^^^^
|
note: not a concrete type
--> /home/runner/work/glacier/glacier/ices/52808.rs:3:10
|
3 | impl<'a> Foo<'a> {
| ^^^^^^^
error: aborting due to previous error
==============
=== stdout ===
=== stderr ===
error[E0601]: `main` function not found in crate `54038`
--> /home/runner/work/glacier/glacier/ices/54038.rs:1:1
|
1 | / struct Foo<'a> {
2 | | data: &'a [u8],
3 | | }
4 | |
... |
9 | | }
10 | | }
| |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/54038.rs`
error: generic `Self` types are currently not permitted in anonymous constants
--> /home/runner/work/glacier/glacier/ices/54038.rs:7:27
|
7 | fn bar(buf: &mut [u8; Self::LEN]) {
| ^^^^^^^^^
|
note: not a concrete type
--> /home/runner/work/glacier/glacier/ices/54038.rs:5:10
|
5 | impl<'a> Foo<'a> {
| ^^^^^^^
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0601`.
==============
=== stdout ===
=== stderr ===
error: generic `Self` types are currently not permitted in anonymous constants
--> /home/runner/work/glacier/glacier/ices/56445-1.rs:6:38
|
6 | fn lfn_contents(&self) -> [char; Self::LFN_FRAGMENT_LEN] { loop { } }
| ^^^^^^^^^^^^^^^^^^^^^^
|
note: not a concrete type
--> /home/runner/work/glacier/glacier/ices/56445-1.rs:3:10
|
3 | impl<'a> OnDiskDirEntry<'a> {
| ^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
==============
=== stdout === === stderr === error: generic `Self` types are currently not permitted in anonymous constants --> /home/runner/work/glacier/glacier/ices/56445-3.rs:5:15 | 5 | ram: [u8; Self::SIZE], | ^^^^^^^^^^ error: aborting due to previous error ==============
=== stdout === === stderr === error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/57739.rs:11:17 | 11 | array: [u8; T::SIZE], | ^^^^^^^ cannot perform const operation using `T` | = note: type parameters may not be used in const expressions = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions error: aborting due to previous error ==============
=== stdout === === stderr === error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/58987-4.rs:2:16 | 2 | inner: [T; R * C] | ^ cannot perform const operation using `R` | = help: const parameters may only be used as standalone arguments, i.e. `R` = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/58987-4.rs:2:20 | 2 | inner: [T; R * C] | ^ cannot perform const operation using `C` | = help: const parameters may only be used as standalone arguments, i.e. `C` = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions error: aborting due to 2 previous errors ==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/60619.rs:2:16
|
2 | buf: [u8; {LEN * 2}]
| ^^^ cannot perform const operation using `LEN`
|
= help: const parameters may only be used as standalone arguments, i.e. `LEN`
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
warning: unnecessary braces around const expression
--> /home/runner/work/glacier/glacier/ices/60619.rs:2:15
|
2 | buf: [u8; {LEN * 2}]
| ^^^^^^^^^ help: remove these braces
|
= note: `#[warn(unused_braces)]` on by default
error: aborting due to previous error; 1 warning emitted
==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/62708.rs:2:52
|
2 | d: [std::marker::PhantomData<D>; MultiDriver::<D>::MAX_DRIVERS],
| ^ cannot perform const operation using `D`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error[E0601]: `main` function not found in crate `62708`
--> /home/runner/work/glacier/glacier/ices/62708.rs:1:1
|
1 | / pub struct MultiDriver<D: ?Sized> {
2 | | d: [std::marker::PhantomData<D>; MultiDriver::<D>::MAX_DRIVERS],
3 | | }
4 | |
5 | | impl<D: ?Sized> MultiDriver<D> {
6 | | const MAX_DRIVERS: usize = 10;
7 | | }
| |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/62708.rs`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0601`.
==============
=== stdout ===
=== stderr ===
error: generic `Self` types are currently not permitted in anonymous constants
--> /home/runner/work/glacier/glacier/ices/64173.rs:4:28
|
4 | array: [(); size_of::<&Self>()],
| ^^^^
error[E0392]: parameter `'s` is never used
--> /home/runner/work/glacier/glacier/ices/64173.rs:3:12
|
3 | struct Bug<'s> {
| ^^ unused parameter
|
= help: consider removing `'s`, referring to it in a field, or using a marker such as `PhantomData`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0392`.
==============
=== stdout === === stderr === error[E0658]: a non-static lifetime is not allowed in a `const` --> /home/runner/work/glacier/glacier/ices/66152.rs:6:23 | 6 | beta: [(); foo::<&'a ()>()], | ^^ | = note: see issue #44580 <rust-lang/rust#44580> for more information = help: add `#![feature(const_generics)]` to the crate attributes to enable error: aborting due to previous error For more information about this error, try `rustc --explain E0658`. ==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/67375.rs:2:25
|
2 | inner: [(); { [|_: &T| {}; 0].len() }],
| ^ cannot perform const operation using `T`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
warning: unnecessary braces around const expression
--> /home/runner/work/glacier/glacier/ices/67375.rs:2:17
|
2 | inner: [(); { [|_: &T| {}; 0].len() }],
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
|
= note: `#[warn(unused_braces)]` on by default
error[E0392]: parameter `T` is never used
--> /home/runner/work/glacier/glacier/ices/67375.rs:1:12
|
1 | struct Bug<T> {
| ^ unused parameter
|
= help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`
error: aborting due to 2 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0392`.
==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:8:16
|
8 | let x: S = MaybeUninit::uninit();
| ^ cannot perform const operation using `S`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:9:45
|
9 | let b = &*(&x as *const _ as *const S);
| ^ cannot perform const operation using `S`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
warning: unused import: `std::marker::PhantomData`
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:2:5
|
2 | use std::marker::PhantomData;
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused import: `self`
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:4:16
|
4 | use std::mem::{self, MaybeUninit};
| ^^^^
error[E0601]: `main` function not found in crate `67945_1`
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:2:1
|
2 | / use std::marker::PhantomData;
3 | |
4 | | use std::mem::{self, MaybeUninit};
5 | |
... |
11 | | }],
12 | | }
| |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/67945-1.rs`
error[E0392]: parameter `S` is never used
--> /home/runner/work/glacier/glacier/ices/67945-1.rs:6:12
|
6 | struct Bug<S> {
| ^ unused parameter
|
= help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
error: aborting due to 4 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0392, E0601.
For more information about an error, try `rustc --explain E0392`.
==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/67945-4.rs:8:27
|
8 | let x: Option<Box<S>> = None;
| ^ cannot perform const operation using `S`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
warning: unused import: `std::marker::PhantomData`
--> /home/runner/work/glacier/glacier/ices/67945-4.rs:2:5
|
2 | use std::marker::PhantomData;
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused imports: `MaybeUninit`, `self`
--> /home/runner/work/glacier/glacier/ices/67945-4.rs:4:16
|
4 | use std::mem::{self, MaybeUninit};
| ^^^^ ^^^^^^^^^^^
error[E0601]: `main` function not found in crate `67945_4`
--> /home/runner/work/glacier/glacier/ices/67945-4.rs:2:1
|
2 | / use std::marker::PhantomData;
3 | |
4 | | use std::mem::{self, MaybeUninit};
5 | |
... |
10 | | }],
11 | | }
| |_^ consider adding a `main` function to `/home/runner/work/glacier/glacier/ices/67945-4.rs`
error[E0392]: parameter `S` is never used
--> /home/runner/work/glacier/glacier/ices/67945-4.rs:6:12
|
6 | struct Bug<S> {
| ^ unused parameter
|
= help: consider removing `S`, referring to it in a field, or using a marker such as `PhantomData`
error: aborting due to 3 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0392, E0601.
For more information about an error, try `rustc --explain E0392`.
==============
=== stdout === === stderr === error: generic `Self` types are currently not permitted in anonymous constants --> /home/runner/work/glacier/glacier/ices/68875.rs:2:20 | 2 | data: &'a [u8; Self::SIZE], | ^^^^^^^^^^ error: aborting due to previous error ==============
=== stdout === === stderr === error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/69296.rs:4:50 | 4 | let mut parts: [*mut u8; mem::size_of::<*mut T>() / mem::size_of::<*mut u8>()] = | ^ cannot perform const operation using `T` | = note: type parameters may not be used in const expressions = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions error: aborting due to previous error ==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/69913.rs:1:53
|
1 | fn foo<const A: usize, const B: usize>(bar: [usize; A + B]) {}
| ^ cannot perform const operation using `A`
|
= help: const parameters may only be used as standalone arguments, i.e. `A`
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/69913.rs:1:57
|
1 | fn foo<const A: usize, const B: usize>(bar: [usize; A + B]) {}
| ^ cannot perform const operation using `B`
|
= help: const parameters may only be used as standalone arguments, i.e. `B`
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: aborting due to 2 previous errors
==============
=== stdout === === stderr === error: generic parameters may not be used in const operations --> /home/runner/work/glacier/glacier/ices/71202.rs:24:17 | 24 | <IsCopy<T>>::VALUE | ^ cannot perform const operation using `T` | = note: type parameters may not be used in const expressions = help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions error: aborting due to previous error ==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/71922.rs:2:39
|
2 | fn bar<const N: usize>() -> [u32; foo(N)] {
| ^ cannot perform const operation using `N`
|
= help: const parameters may only be used as standalone arguments, i.e. `N`
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/71922.rs:3:13
|
3 | [0; foo(N)]
| ^ cannot perform const operation using `N`
|
= help: const parameters may only be used as standalone arguments, i.e. `N`
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: aborting due to 2 previous errors
==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/73980.rs:8:21
|
8 | impl<T> X<T,[u8;L::<T>::S]> {}
| ^ cannot perform const operation using `T`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error: aborting due to previous error
==============
=== stdout ===
=== stderr ===
error: generic parameters may not be used in const operations
--> /home/runner/work/glacier/glacier/ices/75153.rs:11:24
|
11 | pad: [u8; is_zst::<T>()],
| ^ cannot perform const operation using `T`
|
= note: type parameters may not be used in const expressions
= help: use `#![feature(const_generics)]` and `#![feature(const_evaluatable_checked)]` to allow generic const expressions
error[E0277]: the size for values of type `T` cannot be known at compilation time
--> /home/runner/work/glacier/glacier/ices/75153.rs:10:12
|
9 | pub struct AtLeastByte<T: ?Sized> {
| - this type parameter needs to be `Sized`
10 | value: T,
| ^ doesn't have a size known at compile-time
|
= note: only the last field of a struct may have a dynamically sized type
= help: change the field's type to have a statically known size
help: borrowed types always have a statically known size
|
10 | value: &T,
| ^
help: the `Box` type always has a statically known size and allocates its contents in the heap
|
10 | value: Box<T>,
| ^^^^ ^
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
==============
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