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// Check that safe fns are not a subtype of unsafe fns.
trait Foo {
unsafe fn len(&self) -> u32;
}
impl Foo for u32 {
fn len(&self) -> u32 { *self }
//~^ ERROR method `len` has an incompatible type for trait
//~| expected signature `unsafe fn(&_) -> _`
//~| found signature `fn(&_) -> _`
}
fn main() { }
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