test for abort signal reason gc problem

test/js/web/abort/abort-signal-reason.test.js

@@ -0,0 +1,21 @@
+import { expect, test, describe } from "bun:test";
+
+describe("AbortSignal reason", () => {
+  // https://bugs.webkit.org/show_bug.cgi?id=293319
+  test("reason is preserved after GC", () => {
+    const controller = new AbortController();
+    controller.signal;
+    controller.abort(new Error("one two three")); // error must be defined inline so it doesn't get kept alive
+    Bun.gc(true);
+
+    let error;
+    try {
+      controller.signal.throwIfAborted();
+    } catch (e) {
+      error = e;
+    }
+
+    expect(error).toBe(controller.signal.reason);
+    expect(error.message).toBe("one two three");
+  });
+});