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// Because drop recursion can only be detected after drop elaboration which
// happens for codegen:
//@ build-fail
#![deny(unconditional_recursion)]
#![allow(dead_code)]
pub struct RecursiveDrop;
impl Drop for RecursiveDrop {
fn drop(&mut self) { //~ ERROR function cannot return without recursing
let _ = RecursiveDrop;
}
}
#[derive(Default)]
struct NotRecursiveDrop1;
impl Drop for NotRecursiveDrop1 {
fn drop(&mut self) {
// Before drop elaboration, the MIR can look like a recursive drop will
// occur. But it will not, since forget() prevents drop() from running.
let taken = std::mem::take(self);
std::mem::forget(taken);
}
}
struct NotRecursiveDrop2;
impl Drop for NotRecursiveDrop2 {
fn drop(&mut self) {
// Before drop elaboration, the MIR can look like a recursive drop will
// occur. But it will not, since this will panic.
std::panic::panic_any(NotRecursiveDrop2);
}
}
fn main() {}
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