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// check-pass #![allow(warnings)] struct Wrap<'p> { p: &'p mut i32 } impl<'p> Drop for Wrap<'p> { fn drop(&mut self) { *self.p += 1; } } fn main() { let mut x = 0; let wrap = Wrap { p: &mut x }; std::mem::drop(wrap); x = 1; // OK, drop is inert }