--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-tcp-bind6-error.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,176 @@
+/* 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"
+#include <stdio.h>
+#include <stdlib.h>
+
+
+static int close_cb_called = 0;
+
+
+static void close_cb(uv_handle_t* handle) {
+  ASSERT_NOT_NULL(handle);
+  close_cb_called++;
+}
+
+
+TEST_IMPL(tcp_bind6_error_addrinuse) {
+  struct sockaddr_in6 addr;
+  uv_tcp_t server1, server2;
+  int r;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  ASSERT_OK(uv_ip6_addr("::", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server1);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server1, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_tcp_init(uv_default_loop(), &server2);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server2, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  r = uv_listen((uv_stream_t*)&server1, 128, NULL);
+  ASSERT_OK(r);
+  r = uv_listen((uv_stream_t*)&server2, 128, NULL);
+  ASSERT_EQ(r, UV_EADDRINUSE);
+
+  uv_close((uv_handle_t*)&server1, close_cb);
+  uv_close((uv_handle_t*)&server2, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(2, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind6_error_addrnotavail) {
+  struct sockaddr_in6 addr;
+  uv_tcp_t server;
+  int r;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  ASSERT_OK(uv_ip6_addr("4:4:4:4:4:4:4:4", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT_EQ(r, UV_EADDRNOTAVAIL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind6_error_fault) {
+  char garbage[] =
+      "blah blah blah blah blah blah blah blah blah blah blah blah";
+  struct sockaddr_in6* garbage_addr;
+  uv_tcp_t server;
+  int r;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  garbage_addr = (struct sockaddr_in6*) &garbage;
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) garbage_addr, 0);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+/* Notes: On Linux uv_bind6(server, NULL) will segfault the program.  */
+
+TEST_IMPL(tcp_bind6_error_inval) {
+  struct sockaddr_in6 addr1;
+  struct sockaddr_in6 addr2;
+  uv_tcp_t server;
+  int r;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  ASSERT_OK(uv_ip6_addr("::", TEST_PORT, &addr1));
+  ASSERT_OK(uv_ip6_addr("::", TEST_PORT_2, &addr2));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr1, 0);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr2, 0);
+  ASSERT_EQ(r, UV_EINVAL);
+
+  uv_close((uv_handle_t*)&server, close_cb);
+
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(tcp_bind6_localhost_ok) {
+  struct sockaddr_in6 addr;
+  uv_tcp_t server;
+  int r;
+
+  if (!can_ipv6())
+    RETURN_SKIP("IPv6 not supported");
+
+  ASSERT_OK(uv_ip6_addr("::1", TEST_PORT, &addr));
+
+  r = uv_tcp_init(uv_default_loop(), &server);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&server, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}