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// build-fail
// normalize-stderr-test: "<\{closure@.+`" -> "$$CLOSURE`"
// normalize-stderr-test: ".nll/" -> "/"
// ignore-compare-mode-next-solver (hangs)
#![allow(unused)]
#![recursion_limit = "20"]
#![type_length_limit = "20000000"]
#![crate_type = "rlib"]
#[derive(Clone)]
struct A (B);
impl A {
pub fn matches<F: Fn()>(&self, f: &F) {
let &A(ref term) = self;
term.matches(f);
}
}
#[derive(Clone)]
enum B {
Variant1,
Variant2(C),
}
impl B {
pub fn matches<F: Fn()>(&self, f: &F) {
match self {
&B::Variant2(ref factor) => {
factor.matches(&|| ())
}
_ => unreachable!("")
}
}
}
#[derive(Clone)]
struct C (D);
impl C {
pub fn matches<F: Fn()>(&self, f: &F) {
let &C(ref base) = self;
base.matches(&|| {
C(base.clone()).matches(f)
})
}
}
#[derive(Clone)]
struct D (Box<A>);
impl D {
pub fn matches<F: Fn()>(&self, f: &F) {
let &D(ref a) = self;
a.matches(f)
//~^ ERROR reached the recursion limit while instantiating `A::matches::<{closure
}
}
pub fn matches() {
A(B::Variant1).matches(&(|| ()))
}
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