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, 55 insertions, 0 deletions

diff --git a/test/js/web/fetch/fetch-leak.test.js b/test/js/web/fetch/fetch-leak.test.js
new file mode 100644
index 000000000..fa8b225bd
--- /dev/null
+++ b/test/js/web/fetch/fetch-leak.test.js
@@ -0,0 +1,55 @@
+import { test, expect, describe } from "bun:test";
+import { join } from "node:path";
+import { bunEnv, bunExe } from "harness";
+
+describe("fetch doesn't leak", () => {
+  test("fixture #1", async () => {
+    const body = new Blob(["some body in here!".repeat(100)]);
+    const server = Bun.serve({
+      port: 0,
+
+      fetch(req) {
+        return new Response(body);
+      },
+    });
+
+    const proc = Bun.spawn({
+      env: {
+        ...bunEnv,
+        SERVER: `http://${server.hostname}:${server.port}`,
+      },
+      stderr: "inherit",
+      stdout: "inherit",
+      cmd: [bunExe(), join(import.meta.dir, "fetch-leak-test-fixture.js")],
+    });
+
+    const exitCode = await proc.exited;
+    server.stop(true);
+    expect(exitCode).toBe(0);
+  });
+
+  test("fixture #2", async () => {
+    const body = new Blob(["some body in here!".repeat(100)]);
+    const server = Bun.serve({
+      port: 0,
+
+      fetch(req) {
+        return new Response(body);
+      },
+    });
+
+    const proc = Bun.spawn({
+      env: {
+        ...bunEnv,
+        SERVER: `http://${server.hostname}:${server.port}`,
+      },
+      stderr: "inherit",
+      stdout: "inherit",
+      cmd: [bunExe(), join(import.meta.dir, "fetch-leak-test-fixture-2.js")],
+    });
+
+    const exitCode = await proc.exited;
+    server.stop(true);
+    expect(exitCode).toBe(0);
+  });
+});