1 files changed, 14 insertions, 0 deletions
diff --git a/vendor/once_cell/examples/reentrant_init_deadlocks.rs b/vendor/once_cell/examples/reentrant_init_deadlocks.rs
new file mode 100644
index 000000000..af4b5b7d0
--- /dev/null
+++ b/vendor/once_cell/examples/reentrant_init_deadlocks.rs
@@ -0,0 +1,14 @@
+fn main() {
+    let cell = once_cell::sync::OnceCell::<u32>::new();
+    cell.get_or_init(|| {
+        cell.get_or_init(|| 1);
+        2
+    });
+}
+
+/// Dummy test to make it seem hang when compiled as `--test`
+/// See https://github.com/matklad/once_cell/issues/79
+#[test]
+fn dummy_test() {
+    std::thread::sleep(std::time::Duration::from_secs(4));
+}