Fix memory leak in `fetch(url)` (#2989)

* Fix memory leak in `fetch(url)`

* Bump those numbers up

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/test/js/web/fetch/fetch-leak-test-fixture-2.js b/test/js/web/fetch/fetch-leak-test-fixture-2.js
new file mode 100644
index 000000000..7379b1b7b
--- /dev/null
+++ b/test/js/web/fetch/fetch-leak-test-fixture-2.js
@@ -0,0 +1,26 @@
+import { heapStats } from "bun:jsc";
+
+const { SERVER } = process.env;
+
+if (typeof SERVER === "undefined" || !SERVER?.length) {
+  throw new Error("SERVER environment variable is not set");
+}
+
+const COUNT = parseInt(process.env.COUNT || "20", 10);
+var oks = 0;
+await (async function runAll() {
+  for (let j = 0; j < COUNT; j++) {
+    oks += (await fetch(SERVER)).ok;
+  }
+})();
+
+if (oks !== COUNT) {
+  throw new Error("Not all requests succeeded");
+}
+
+await Bun.sleep(10);
+Bun.gc(true);
+
+if ((heapStats().objectTypeCounts.Response ?? 0) > 5) {
+  throw new Error("Too many Response objects: " + heapStats().objectTypeCounts.Response);
+}