blob: 37fd22a9dd2d0e08f311a1a8e819262d676351a9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// run-pass
// compile-flags: -g -O -Zmir-opt-level=0 -Zinline-mir=y -Zmir-enable-passes=+ReferencePropagation
#![allow(dead_code)]
use std::marker::PhantomData;
struct RawTable<T> {
marker: PhantomData<T>,
}
impl<T> RawTable<T> {
fn iter(&self) -> RawIter<T> {
RawIter { marker: PhantomData }
}
}
struct RawIter<T> {
marker: PhantomData<T>,
}
impl<T> Iterator for RawIter<T> {
type Item = ();
fn next(&mut self) -> Option<()> {
None
}
}
struct HashMap<T> {
table: RawTable<T>,
}
struct Iter<T> {
inner: RawIter<T>, // Removing this breaks the reproducer
}
impl<T> IntoIterator for &HashMap<T> {
type Item = T;
type IntoIter = Iter<T>;
fn into_iter(self) -> Iter<T> {
Iter { inner: self.table.iter() }
}
}
impl<T> Iterator for Iter<T> {
type Item = T;
fn next(&mut self) -> Option<T> {
None
}
}
pub fn main() {
let maybe_hash_set: Option<HashMap<()>> = None;
for _ in maybe_hash_set.as_ref().unwrap_or(&HashMap { table: RawTable { marker: PhantomData } })
{
}
}
|
