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//@ known-bug: #122704
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use std::any::Any;
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pub struct Foo {
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bar: Box<dyn for<'a> Fn(&'a usize) -> Box<dyn Any + 'a>>,
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}
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impl Foo {
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pub fn ack<I>(&mut self, f: impl for<'a> Fn(&'a usize) -> Box<I>) {
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self.bar = Box::new(|baz| Box::new(f(baz)));
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}
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}
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fn main() {}
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