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delay E0512 as a bug by checking the references_error

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fix #106695
This commit is contained in:
Yiming Lei 2023-01-12 12:28:07 -08:00
parent 1bc3683b32
commit d1478a5600
5 changed files with 15 additions and 26 deletions
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10
compiler/rustc_hir_typeck/src/intrinsicck.rs
View File

@ -105,6 +105,16 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
} else {
err.note(&format!("source type: `{}` ({})", from, skeleton_string(from, sk_from)))
.note(&format!("target type: `{}` ({})", to, skeleton_string(to, sk_to)));
let mut should_delay_as_bug = false;
if let Err(LayoutError::Unknown(bad_from)) = sk_from && bad_from.references_error() {
should_delay_as_bug = true;
}
if let Err(LayoutError::Unknown(bad_to)) = sk_to && bad_to.references_error() {
should_delay_as_bug = true;
}
if should_delay_as_bug {
err.delay_as_bug();
}
}
err.emit();
}

1
tests/ui/type-alias-impl-trait/issue-53092-2.rs
View File

@ -4,7 +4,6 @@
type Bug<T, U> = impl Fn(T) -> U + Copy; //~ ERROR cycle detected
const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
//~^ ERROR: cannot transmute
fn make_bug<T, U: From<T>>() -> Bug<T, U> {
|x| x.into() //~ ERROR the trait bound `U: From<T>` is not satisfied

17
tests/ui/type-alias-impl-trait/issue-53092-2.stderr
View File

@ -24,23 +24,14 @@ LL | | CONST_BUG(0);
LL | | }
| |_^
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/issue-53092-2.rs:6:41
|
LL | const CONST_BUG: Bug<u8, ()> = unsafe { std::mem::transmute(|_: u8| ()) };
| ^^^^^^^^^^^^^^^^^^^
|
= note: source type: `[closure@$DIR/issue-53092-2.rs:6:61: 6:68]` (0 bits)
= note: target type: `Bug<u8, ()>` (size can vary because of [type error])
error[E0277]: the trait bound `U: From<T>` is not satisfied
--> $DIR/issue-53092-2.rs:10:5
--> $DIR/issue-53092-2.rs:9:5
|
LL | |x| x.into()
| ^^^^^^^^^^^^ the trait `From<T>` is not implemented for `U`
|
note: required by a bound in `make_bug`
--> $DIR/issue-53092-2.rs:9:19
--> $DIR/issue-53092-2.rs:8:19
|
LL | fn make_bug<T, U: From<T>>() -> Bug<T, U> {
| ^^^^^^^ required by this bound in `make_bug`
@ -49,7 +40,7 @@ help: consider restricting type parameter `U`
LL | type Bug<T, U: std::convert::From<T>> = impl Fn(T) -> U + Copy;
| +++++++++++++++++++++++
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0277, E0391, E0512.
Some errors have detailed explanations: E0277, E0391.
For more information about an error, try `rustc --explain E0277`.

1
tests/ui/type-alias-impl-trait/no_inferrable_concrete_type.rs
View File

@ -15,5 +15,4 @@ mod foo {
fn main() {
let _: foo::Foo = std::mem::transmute(0u8);
//~^ ERROR cannot transmute between types of different sizes, or dependently-sized types
}

12
tests/ui/type-alias-impl-trait/no_inferrable_concrete_type.stderr
View File

@ -6,15 +6,5 @@ LL | pub type Foo = impl Copy;
|
= note: `Foo` must be used in combination with a concrete type within the same module
error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
--> $DIR/no_inferrable_concrete_type.rs:17:23
|
LL | let _: foo::Foo = std::mem::transmute(0u8);
| ^^^^^^^^^^^^^^^^^^^
|
= note: source type: `u8` (8 bits)
= note: target type: `Foo` (size can vary because of [type error])
error: aborting due to previous error
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0512`.