--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-tcp-close-while-connecting.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,97 @@
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+
+static uv_timer_t timer1_handle;
+static uv_timer_t timer2_handle;
+static uv_tcp_t tcp_handle;
+
+static int connect_cb_called;
+static int timer1_cb_called;
+static int close_cb_called;
+static int netunreach_errors;
+
+
+static void close_cb(uv_handle_t* handle) {
+  close_cb_called++;
+}
+
+
+static void connect_cb(uv_connect_t* req, int status) {
+  /* The expected error is UV_ECANCELED but the test tries to connect to what
+   * is basically an arbitrary address in the expectation that no network path
+   * exists, so UV_ENETUNREACH is an equally plausible outcome.
+   */
+  ASSERT(status == UV_ECANCELED || status == UV_ENETUNREACH);
+  uv_timer_stop(&timer2_handle);
+  connect_cb_called++;
+  if (status == UV_ENETUNREACH)
+    netunreach_errors++;
+}
+
+
+static void timer1_cb(uv_timer_t* handle) {
+  uv_close((uv_handle_t*)handle, close_cb);
+  uv_close((uv_handle_t*)&tcp_handle, close_cb);
+  timer1_cb_called++;
+}
+
+
+static void timer2_cb(uv_timer_t* handle) {
+  ASSERT(0 && "should not be called");
+}
+
+
+TEST_IMPL(tcp_close_while_connecting) {
+  uv_connect_t connect_req;
+  struct sockaddr_in addr;
+  uv_loop_t* loop;
+  int r;
+
+  loop = uv_default_loop();
+  ASSERT_OK(uv_ip4_addr("1.2.3.4", TEST_PORT, &addr));
+  ASSERT_OK(uv_tcp_init(loop, &tcp_handle));
+  r = uv_tcp_connect(&connect_req,
+                     &tcp_handle,
+                     (const struct sockaddr*) &addr,
+                     connect_cb);
+  if (r == UV_ENETUNREACH)
+    RETURN_SKIP("Network unreachable.");
+  ASSERT_OK(r);
+  ASSERT_OK(uv_timer_init(loop, &timer1_handle));
+  ASSERT_OK(uv_timer_start(&timer1_handle, timer1_cb, 1, 0));
+  ASSERT_OK(uv_timer_init(loop, &timer2_handle));
+  ASSERT_OK(uv_timer_start(&timer2_handle, timer2_cb, 86400 * 1000, 0));
+  ASSERT_OK(uv_run(loop, UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, connect_cb_called);
+  ASSERT_EQ(1, timer1_cb_called);
+  ASSERT_EQ(2, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(loop);
+
+  if (netunreach_errors > 0)
+    RETURN_SKIP("Network unreachable.");
+
+  return 0;
+}