add test for ice called Option::unwrap() on a None value in collector.rs:934:13 #105488

Fixes https://github.com/rust-lang/rust/issues/105488
This commit is contained in:
Matthias Krüger 2024-04-07 00:25:56 +02:00
parent 7d9e1067fd
commit 7836909402
2 changed files with 58 additions and 0 deletions

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@ -0,0 +1,42 @@
// ICE failed to resolve instance for <fn() -> impl MyFnOnce ...
// issue: rust-lang/rust#105488
//@ build-fail
//~^^^ ERROR overflow evaluating the requirement `fn() -> impl MyFnOnce
pub trait MyFnOnce {
type Output;
fn call_my_fn_once(self) -> Self::Output;
}
pub struct WrapFnOnce<F>(F);
impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for WrapFnOnce<F> {
type Output = D::Output;
fn call_my_fn_once(self) -> Self::Output {
D::call_my_fn_once(self.0())
}
}
impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for F {
type Output = D::Output;
fn call_my_fn_once(self) -> Self::Output {
D::call_my_fn_once(self())
}
}
pub fn my_fn_1() -> impl MyFnOnce {
my_fn_2
}
pub fn my_fn_2() -> impl MyFnOnce {
WrapFnOnce(my_fn_1)
}
fn main() {
let v = my_fn_1();
let _ = v.call_my_fn_once();
}

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error[E0275]: overflow evaluating the requirement `fn() -> impl MyFnOnce {my_fn_2}: MyFnOnce`
|
= help: consider increasing the recursion limit by adding a `#![recursion_limit = "256"]` attribute to your crate (`failed_to_resolve_instance_ice_105488`)
note: required for `WrapFnOnce<fn() -> impl MyFnOnce {my_fn_1}>` to implement `MyFnOnce`
--> $DIR/failed-to-resolve-instance-ice-105488.rs:14:37
|
LL | impl<F: FnOnce() -> D, D: MyFnOnce> MyFnOnce for WrapFnOnce<F> {
| -------- ^^^^^^^^ ^^^^^^^^^^^^^
| |
| unsatisfied trait bound introduced here
= note: 126 redundant requirements hidden
= note: required for `WrapFnOnce<fn() -> impl MyFnOnce {my_fn_1}>` to implement `MyFnOnce`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0275`.