35 lines
743 B
Rust
35 lines
743 B
Rust
// build-pass
|
|
// compile-flags:-Zpolymorphize=on -Csymbol-mangling-version=v0
|
|
|
|
fn foo(f: impl Fn()) {
|
|
// Move a non-copy type into `x` so that it implements `FnOnce`.
|
|
let outer = Vec::<u32>::new();
|
|
let x = move |_: ()| {
|
|
let inner = outer;
|
|
()
|
|
};
|
|
|
|
// Don't use `f` in `y`, but refer to `x` so that the closure substs contain a reference to
|
|
// `x` that will differ for each instantiation despite polymorphisation of the varying
|
|
// argument.
|
|
let y = || x(());
|
|
|
|
// Consider `f` used in `foo`.
|
|
f();
|
|
// Use `y` so that it is visited in monomorphisation collection.
|
|
y();
|
|
}
|
|
|
|
fn entry_a() {
|
|
foo(|| ());
|
|
}
|
|
|
|
fn entry_b() {
|
|
foo(|| ());
|
|
}
|
|
|
|
fn main() {
|
|
entry_a();
|
|
entry_b();
|
|
}
|