From 72b180c7cbdfd829727e96725c907e326a8127f0 Mon Sep 17 00:00:00 2001
From: Anders Kaseorg <andersk@mit.edu>
Date: Mon, 17 Oct 2022 09:30:13 -0700
Subject: [PATCH] Add failing test for #124

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
---
 gc/tests/resurrection.rs | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 gc/tests/resurrection.rs

diff --git a/gc/tests/resurrection.rs b/gc/tests/resurrection.rs
new file mode 100644
index 0000000..7efad46
--- /dev/null
+++ b/gc/tests/resurrection.rs
@@ -0,0 +1,36 @@
+use gc::{force_collect, Finalize, Gc, GcCell};
+use gc_derive::{Finalize, Trace};
+
+#[derive(Finalize, Trace)]
+struct Foo {
+    bar: GcCell<Option<Gc<Bar>>>,
+}
+
+#[derive(Trace)]
+struct Bar {
+    string: String,
+    foo: Gc<Foo>,
+    this: GcCell<Option<Gc<Bar>>>,
+}
+
+impl Finalize for Bar {
+    fn finalize(&self) {
+        *self.foo.bar.borrow_mut() = self.this.borrow().clone();
+    }
+}
+
+#[test]
+fn resurrection_by_finalizer() {
+    let foo = Gc::new(Foo {
+        bar: GcCell::new(None),
+    });
+    let bar = Gc::new(Bar {
+        string: "Hello, world!".to_string(),
+        foo: foo.clone(),
+        this: GcCell::new(None),
+    });
+    *bar.this.borrow_mut() = Some(bar.clone());
+    drop(bar);
+    force_collect();
+    assert_eq!(foo.bar.borrow().as_ref().unwrap().string, "Hello, world!");
+}