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authorAlbert Larsan <74931857+albertlarsan68@users.noreply.github.com>2023-01-05 09:13:28 +0100
committerAlbert Larsan <74931857+albertlarsan68@users.noreply.github.com>2023-01-11 09:32:08 +0000
commitcf2dff2b1e3fa55fa5415d524200070d0d7aacfe (patch)
tree40a88d9a46aaf3e8870676eb2538378b75a263eb /tests/ui/traits/object/exclusion.rs
parentca855e6e42787ecd062d81d53336fe6788ef51a9 (diff)
downloadrust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.tar.gz
rust-cf2dff2b1e3fa55fa5415d524200070d0d7aacfe.zip
Move /src/test to /tests
Diffstat (limited to 'tests/ui/traits/object/exclusion.rs')
-rw-r--r--tests/ui/traits/object/exclusion.rs19
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 00000000000..766dceeaffe
--- /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();
+}