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add test for #121807

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Fixes #121807
This commit is contained in:
Matthias Krüger 2024-03-21 21:27:37 +01:00
parent 35a78459aa
commit bdafec33d5
2 changed files with 80 additions and 0 deletions
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27
tests/ui/borrowck/ice-mutability-error-slicing-121807.rs Normal file
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//@ edition:2015
// test for ICE #121807 begin <= end (12 <= 11) when slicing 'Self::Assoc<'_>'
// fixed by #122749
trait MemoryUnit { // ERROR: not all trait items implemented, missing: `read_word`
extern "C" fn read_word(&mut self) -> u8;
extern "C" fn read_dword(Self::Assoc<'_>) -> u16;
//~^ WARN anonymous parameters are deprecated and will be removed in the next edition
//~^^ WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
//~^^^ ERROR associated type `Assoc` not found for `Self`
}
struct ROM {}
impl MemoryUnit for ROM {
//~^ ERROR not all trait items implemented, missing: `read_word`
extern "C" fn read_dword(&'s self) -> u16 {
//~^ ERROR use of undeclared lifetime name `'s`
//~^^ ERROR method `read_dword` has a `&self` declaration in the impl, but not in the trait
let a16 = self.read_word() as u16;
let b16 = self.read_word() as u16;
(b16 << 8) | a16
}
}
pub fn main() {}

53
tests/ui/borrowck/ice-mutability-error-slicing-121807.stderr Normal file
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error[E0261]: use of undeclared lifetime name `'s`
--> $DIR/ice-mutability-error-slicing-121807.rs:17:31
|
LL | extern "C" fn read_dword(&'s self) -> u16 {
| ^^ undeclared lifetime
|
help: consider introducing lifetime `'s` here
|
LL | extern "C" fn read_dword<'s>(&'s self) -> u16 {
| ++++
help: consider introducing lifetime `'s` here
|
LL | impl<'s> MemoryUnit for ROM {
| ++++
warning: anonymous parameters are deprecated and will be removed in the next edition
--> $DIR/ice-mutability-error-slicing-121807.rs:7:30
|
LL | extern "C" fn read_dword(Self::Assoc<'_>) -> u16;
| ^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: Self::Assoc<'_>`
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
= note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
= note: `#[warn(anonymous_parameters)]` on by default
error[E0220]: associated type `Assoc` not found for `Self`
--> $DIR/ice-mutability-error-slicing-121807.rs:7:36
|
LL | extern "C" fn read_dword(Self::Assoc<'_>) -> u16;
| ^^^^^ associated type `Assoc` not found
error[E0185]: method `read_dword` has a `&self` declaration in the impl, but not in the trait
--> $DIR/ice-mutability-error-slicing-121807.rs:17:5
|
LL | extern "C" fn read_dword(Self::Assoc<'_>) -> u16;
| ------------------------------------------------- trait method declared without `&self`
...
LL | extern "C" fn read_dword(&'s self) -> u16 {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `&self` used in impl
error[E0046]: not all trait items implemented, missing: `read_word`
--> $DIR/ice-mutability-error-slicing-121807.rs:15:1
|
LL | extern "C" fn read_word(&mut self) -> u8;
| ----------------------------------------- `read_word` from trait
...
LL | impl MemoryUnit for ROM {
| ^^^^^^^^^^^^^^^^^^^^^^^ missing `read_word` in implementation
error: aborting due to 4 previous errors; 1 warning emitted
Some errors have detailed explanations: E0046, E0185, E0220, E0261.
For more information about an error, try `rustc --explain E0046`.