mirror of https://github.com/rust-lang/rust.git
Rollup merge of #123579 - matthiaskrgr:I_Love_Tests, r=jieyouxu
add some more tests Fixes https://github.com/rust-lang/rust/issues/115806 Fixes https://github.com/rust-lang/rust/issues/116710 Fixes https://github.com/rust-lang/rust/issues/123145 Fixes https://github.com/rust-lang/rust/issues/105488 Fixes https://github.com/rust-lang/rust/issues/122488 Fixes https://github.com/rust-lang/rust/issues/123078
This commit is contained in:
Matthias Krüger
GitHub
commit
bbc7807b42
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// ICE unknown alias DefKind: AnonConst
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// issue: rust-lang/rust#116710
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#![feature(generic_const_exprs)]
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#![allow(incomplete_features)]
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struct A<const N: u32 = 1, const M: u32 = u8>;
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//~^ ERROR expected value, found builtin type `u8`
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trait Trait {}
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impl<const N: u32> Trait for A<N> {}
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impl<const N: u32> Trait for A<N> {}
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//~^ ERROR conflicting implementations of trait `Trait` for type `A<_>`
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pub fn main() {}
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error[E0423]: expected value, found builtin type `u8`
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--> $DIR/unknown-alias-defkind-anonconst-ice-116710.rs:6:43
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LL | struct A<const N: u32 = 1, const M: u32 = u8>;
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| ^^ not a value
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error[E0119]: conflicting implementations of trait `Trait` for type `A<_>`
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--> $DIR/unknown-alias-defkind-anonconst-ice-116710.rs:12:1
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LL | impl<const N: u32> Trait for A<N> {}
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| --------------------------------- first implementation here
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LL |
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LL | impl<const N: u32> Trait for A<N> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `A<_>`
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error: aborting due to 2 previous errors
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Some errors have detailed explanations: E0119, E0423.
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For more information about an error, try `rustc --explain E0119`.
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// ICE: assertion failed: !value.has_infer()
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// issue: rust-lang/rust#115806
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#![feature(associated_const_equality)]
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#![allow(incomplete_features)]
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pub struct NoPin;
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impl<TA> Pins<TA> for NoPin {}
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pub trait PinA<PER> {
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const A: &'static () = &();
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}
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pub trait Pins<USART> {}
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impl<USART, T> Pins<USART> for T where T: PinA<USART, A = { &() }> {}
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//~^ ERROR conflicting implementations of trait `Pins<_>` for type `NoPin`
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pub fn main() {}
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error[E0119]: conflicting implementations of trait `Pins<_>` for type `NoPin`
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--> $DIR/assoc-const-no-infer-ice-115806.rs:16:1
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LL | impl<TA> Pins<TA> for NoPin {}
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| --------------------------- first implementation here
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...
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LL | impl<USART, T> Pins<USART> for T where T: PinA<USART, A = { &() }> {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `NoPin`
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= note: downstream crates may implement trait `PinA<_>` for type `NoPin`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0119`.
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// ICE failed to resolve instance for <fn() -> impl MyFnOnce ...
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// issue: rust-lang/rust#105488
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//@ build-fail
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//~^^^ ERROR overflow evaluating the requirement `fn() -> impl MyFnOnce
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pub trait MyFnOnce {
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type Output;
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fn call_my_fn_once(self) -> Self::Output;
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}
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pub struct WrapFnOnce<F>(F);
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impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for WrapFnOnce<F> {
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type Output = D::Output;
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fn call_my_fn_once(self) -> Self::Output {
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D::call_my_fn_once(self.0())
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}
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}
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impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for F {
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type Output = D::Output;
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fn call_my_fn_once(self) -> Self::Output {
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D::call_my_fn_once(self())
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}
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}
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pub fn my_fn_1() -> impl MyFnOnce {
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my_fn_2
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}
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pub fn my_fn_2() -> impl MyFnOnce {
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WrapFnOnce(my_fn_1)
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}
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fn main() {
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let v = my_fn_1();
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let _ = v.call_my_fn_once();
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}
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error[E0275]: overflow evaluating the requirement `fn() -> impl MyFnOnce {my_fn_2}: MyFnOnce`
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= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`failed_to_resolve_instance_ice_105488`)
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note: required for `WrapFnOnce<fn() -> impl MyFnOnce {my_fn_1}>` to implement `MyFnOnce`
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--> $DIR/failed-to-resolve-instance-ice-105488.rs:14:37
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LL | impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for WrapFnOnce<F> {
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| -------- ^^^^^^^^ ^^^^^^^^^^^^^
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| |
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| unsatisfied trait bound introduced here
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= note: 126 redundant requirements hidden
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= note: required for `WrapFnOnce<fn() -> impl MyFnOnce {my_fn_1}>` to implement `MyFnOnce`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0275`.
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// ICE failed to resolve instance for ...
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// issue: rust-lang/rust#123145
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//@ build-fail
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//~^^^ ERROR overflow evaluating the requirement `(fn() -> impl Handler
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trait Handler {
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fn handle(&self) {}
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}
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impl<H: Handler, F: Fn() -> H> Handler for F {}
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impl<L: Handler> Handler for (L,) {}
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fn one() -> impl Handler {
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(one,)
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}
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fn main() {
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one.handle();
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}
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error[E0275]: overflow evaluating the requirement `(fn() -> impl Handler {one},): Handler`
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note: required for `fn() -> impl Handler {one}` to implement `Handler`
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--> $DIR/failed-to-resolve-instance-ice-123145.rs:10:32
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LL | impl<H: Handler, F: Fn() -> H> Handler for F {}
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| ------- ^^^^^^^ ^
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| |
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| unsatisfied trait bound introduced here
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= note: 2 redundant requirements hidden
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= note: required for `fn() -> impl Handler {one}` to implement `Handler`
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0275`.
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// ICE !base.layout().is_sized()
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// issue: rust-lang/rust#123078
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struct S {
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a: [u8],
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//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
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b: (),
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}
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const C: S = unsafe { std::mem::transmute(()) };
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//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
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const _: [(); {
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C;
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0
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}] = [];
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pub fn main() {}
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error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/base-layout-is-sized-ice-123078.rs:5:8
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LL | a: [u8],
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| ^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `[u8]`
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= note: only the last field of a struct may have a dynamically sized type
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= help: change the field's type to have a statically known size
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help: borrowed types always have a statically known size
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LL | a: &[u8],
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| +
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help: the `Box` type always has a statically known size and allocates its contents in the heap
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LL | a: Box<[u8]>,
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| ++++ +
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error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
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--> $DIR/base-layout-is-sized-ice-123078.rs:10:23
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LL | const C: S = unsafe { std::mem::transmute(()) };
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| ^^^^^^^^^^^^^^^^^^^
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= note: source type: `()` (0 bits)
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= note: target type: `S` (this type does not have a fixed size)
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error: aborting due to 2 previous errors
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Some errors have detailed explanations: E0277, E0512.
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For more information about an error, try `rustc --explain E0277`.
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// ICE Unexpected unsized type tail: &ReStatic [u8]
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// issue: rust-lang/rust#122488
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use std::ops::Deref;
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struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(V, U);
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//~^ ERROR the size for values of type `V` cannot be known at compilation time
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const DATA: *const ArenaSet<Vec<u8>> = std::ptr::null_mut();
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pub fn main() {}
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error[E0277]: the size for values of type `V` cannot be known at compilation time
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--> $DIR/issue-unsized-tail-restatic-ice-122488.rs:5:61
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(V, U);
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| -------------------------------- ^ doesn't have a size known at compile-time
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| |
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| this type parameter needs to be `Sized`
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= note: only the last field of a struct may have a dynamically sized type
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= help: change the field's type to have a statically known size
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(V, U);
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LL + struct ArenaSet<U: Deref, V = <U as Deref>::Target>(V, U);
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help: borrowed types always have a statically known size
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(&V, U);
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help: the `Box` type always has a statically known size and allocates its contents in the heap
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LL | struct ArenaSet<U: Deref, V: ?Sized = <U as Deref>::Target>(Box<V>, U);
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0277`.
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