mirror of https://github.com/rust-lang/rust
58 lines
1.1 KiB
Rust
58 lines
1.1 KiB
Rust
//@ run-pass
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//@ compile-flags: -g -O -Zmir-opt-level=0 -Zinline-mir=y -Zmir-enable-passes=+ReferencePropagation
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#![allow(dead_code)]
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use std::marker::PhantomData;
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struct RawTable<T> {
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marker: PhantomData<T>,
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}
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impl<T> RawTable<T> {
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fn iter(&self) -> RawIter<T> {
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RawIter { marker: PhantomData }
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}
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}
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struct RawIter<T> {
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marker: PhantomData<T>,
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}
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impl<T> Iterator for RawIter<T> {
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type Item = ();
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fn next(&mut self) -> Option<()> {
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None
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}
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}
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struct HashMap<T> {
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table: RawTable<T>,
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}
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struct Iter<T> {
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inner: RawIter<T>, // Removing this breaks the reproducer
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}
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impl<T> IntoIterator for &HashMap<T> {
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type Item = T;
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type IntoIter = Iter<T>;
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fn into_iter(self) -> Iter<T> {
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Iter { inner: self.table.iter() }
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}
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}
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impl<T> Iterator for Iter<T> {
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type Item = T;
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fn next(&mut self) -> Option<T> {
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None
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}
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}
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pub fn main() {
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let maybe_hash_set: Option<HashMap<()>> = None;
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for _ in maybe_hash_set.as_ref().unwrap_or(&HashMap { table: RawTable { marker: PhantomData } })
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{
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}
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}
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