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#![feature(negative_impls)]
use std::marker::Sync;
struct Foo { a: isize }
impl !Sync for Foo {}
fn bar<T: Sync>(_: T) {}
fn main() {
let x = Foo { a: 5 };
bar(x);
//~^ ERROR `Foo` cannot be shared between threads safely [E0277]
}
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