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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/traits/object/exclusion.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/traits/object/exclusion.rs')
-rw-r--r-- | tests/ui/traits/object/exclusion.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/traits/object/exclusion.rs b/tests/ui/traits/object/exclusion.rs new file mode 100644 index 000000000..766dceeaf --- /dev/null +++ b/tests/ui/traits/object/exclusion.rs @@ -0,0 +1,19 @@ +// run-pass +trait Future: 'static { + // The requirement for Self: Sized must prevent instantiation of + // Future::forget in vtables, otherwise there's an infinite type + // recursion through <Map<...> as Future>::forget. + fn forget(self) where Self: Sized { + Box::new(Map(self)) as Box<dyn Future>; + } +} + +struct Map<A>(#[allow(unused_tuple_struct_fields)] A); +impl<A: Future> Future for Map<A> {} + +pub struct Promise; +impl Future for Promise {} + +fn main() { + Promise.forget(); +} |