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add test for Compiler panic using fn_traits #81974

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Fixes https://github.com/rust-lang/rust/issues/81974
This commit is contained in:
Matthias Krüger 2024-03-25 20:15:28 +01:00
parent 60b5ca6275
commit 5f95fc1dff
2 changed files with 137 additions and 0 deletions
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59
tests/ui/layout/rust-call-abi-not-a-tuple-ice-81974.rs Normal file
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// ICE argument to function with "rust-call" ABI is not a tuple
// issue: rust-lang/rust#81974
#![feature(unboxed_closures)]
#![feature(fn_traits)]
use std::collections::HashMap;
use std::hash::Hash;
struct CachedFun<A, B> {
cache: HashMap<A, B>,
fun: fn(&mut CachedFun<A, B>, A) -> B,
}
impl<A: Eq + Hash, B> CachedFun<A, B> {
fn new(fun: fn(&mut Self, A) -> B) -> Self {
CachedFun {
cache: HashMap::new(),
fun,
}
}
}
impl<A, B> FnOnce<A> for CachedFun<A, B>
//~^ ERROR type parameter to bare `FnOnce` trait must be a tuple
where
A: Eq + Hash + Clone,
B: Clone,
{
type Output = B;
extern "rust-call" fn call_once(mut self, a: A) -> Self::Output {
//~^ ERROR functions with the "rust-call" ABI must take a single non-self tuple argument
self.call_mut(a)
//~^ ERROR `A` is not a tuple
}
}
impl<A, B> FnMut<A> for CachedFun<A, B>
//~^ ERROR type parameter to bare `FnMut` trait must be a tuple
where
A: Eq + Hash + Clone,
B: Clone,
{
extern "rust-call" fn call_mut(&mut self, a: A) -> Self::Output {
//~^ ERROR functions with the "rust-call" ABI must take a single non-self tuple argument
self.cache.get(&a).map(|a| a.clone()).unwrap_or_else(|| {
let b = (self.fun)(self, a.clone());
self.cache.insert(a, b.clone());
b
})
}
}
fn main() -> () {
let pesce = |y: &mut CachedFun<i32, i32>, x| x + 1;
let cachedcoso = CachedFun::new(pesce);
cachedcoso.call_once(1);
//~^ ERROR `i32` is not a tuple
}

78
tests/ui/layout/rust-call-abi-not-a-tuple-ice-81974.stderr Normal file
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error[E0059]: type parameter to bare `FnOnce` trait must be a tuple
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:24:12
|
LL | impl<A, B> FnOnce<A> for CachedFun<A, B>
| ^^^^^^^^^ the trait `Tuple` is not implemented for `A`
|
note: required by a bound in `FnOnce`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
help: consider further restricting this bound
|
LL | A: Eq + Hash + Clone + std::marker::Tuple,
| ++++++++++++++++++++
error[E0059]: type parameter to bare `FnMut` trait must be a tuple
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:38:12
|
LL | impl<A, B> FnMut<A> for CachedFun<A, B>
| ^^^^^^^^ the trait `Tuple` is not implemented for `A`
|
note: required by a bound in `FnMut`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
help: consider further restricting this bound
|
LL | A: Eq + Hash + Clone + std::marker::Tuple,
| ++++++++++++++++++++
error[E0277]: functions with the "rust-call" ABI must take a single non-self tuple argument
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:31:5
|
LL | extern "rust-call" fn call_once(mut self, a: A) -> Self::Output {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Tuple` is not implemented for `A`
|
help: consider further restricting this bound
|
LL | A: Eq + Hash + Clone + std::marker::Tuple,
| ++++++++++++++++++++
error[E0277]: functions with the "rust-call" ABI must take a single non-self tuple argument
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:44:5
|
LL | extern "rust-call" fn call_mut(&mut self, a: A) -> Self::Output {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Tuple` is not implemented for `A`
|
help: consider further restricting this bound
|
LL | A: Eq + Hash + Clone + std::marker::Tuple,
| ++++++++++++++++++++
error[E0277]: `A` is not a tuple
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:33:23
|
LL | self.call_mut(a)
| -------- ^ the trait `Tuple` is not implemented for `A`
| |
| required by a bound introduced by this call
|
note: required by a bound in `call_mut`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
help: consider further restricting this bound
|
LL | A: Eq + Hash + Clone + std::marker::Tuple,
| ++++++++++++++++++++
error[E0277]: `i32` is not a tuple
--> $DIR/rust-call-abi-not-a-tuple-ice-81974.rs:57:26
|
LL | cachedcoso.call_once(1);
| --------- ^ the trait `Tuple` is not implemented for `i32`
| |
| required by a bound introduced by this call
|
note: required by a bound in `call_once`
--> $SRC_DIR/core/src/ops/function.rs:LL:COL
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0059, E0277.
For more information about an error, try `rustc --explain E0059`.