File: closure-bounds-cant-promote-superkind-in-struct.rs

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rustc 1.70.0%2Bdfsg1-9
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struct X<F> where F: FnOnce() + 'static + Send {
    field: F,
}

fn foo<F>(blk: F) -> X<F> where F: FnOnce() + 'static {
    //~^ ERROR `F` cannot be sent between threads safely
    return X { field: blk };
}

fn main() {
}