--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-error.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,82 @@
+/* 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"
+#if defined(_WIN32)
+# include "../src/win/winapi.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/*
+ * Synthetic errors (errors that originate from within libuv, not the system)
+ * should produce sensible error messages when run through uv_strerror().
+ *
+ * See https://github.com/joyent/libuv/issues/210
+ */
+TEST_IMPL(error_message) {
+#if defined(__ASAN__)
+  RETURN_SKIP("Test does not currently work in ASAN");
+#endif
+  char buf[32];
+
+  /* Cop out. Can't do proper checks on systems with
+   * i18n-ized error messages...
+   */
+  if (strcmp(uv_strerror(0), "Success") != 0) {
+    printf("i18n error messages detected, skipping test.\n");
+    return 0;
+  }
+
+  ASSERT_NULL(strstr(uv_strerror(UV_EINVAL), "Success"));
+  ASSERT_OK(strcmp(uv_strerror(1337), "Unknown error"));
+  ASSERT_OK(strcmp(uv_strerror(-1337), "Unknown error"));
+
+  ASSERT_NULL(strstr(uv_strerror_r(UV_EINVAL, buf, sizeof(buf)), "Success"));
+  ASSERT_NOT_NULL(strstr(uv_strerror_r(1337, buf, sizeof(buf)), "1337"));
+  ASSERT_NOT_NULL(strstr(uv_strerror_r(-1337, buf, sizeof(buf)), "-1337"));
+
+  return 0;
+}
+
+
+TEST_IMPL(sys_error) {
+#if defined(_WIN32)
+  ASSERT_EQ(uv_translate_sys_error(ERROR_NOACCESS), UV_EFAULT);
+  ASSERT_EQ(uv_translate_sys_error(ERROR_ELEVATION_REQUIRED), UV_EACCES);
+  ASSERT_EQ(uv_translate_sys_error(WSAEADDRINUSE), UV_EADDRINUSE);
+  ASSERT_EQ(uv_translate_sys_error(ERROR_BAD_PIPE), UV_EPIPE);
+#else
+  ASSERT_EQ(uv_translate_sys_error(EPERM), UV_EPERM);
+  ASSERT_EQ(uv_translate_sys_error(EPIPE), UV_EPIPE);
+  ASSERT_EQ(uv_translate_sys_error(EINVAL), UV_EINVAL);
+#endif
+  ASSERT_EQ(uv_translate_sys_error(UV_EINVAL), UV_EINVAL);
+  ASSERT_EQ(uv_translate_sys_error(UV_ERANGE), UV_ERANGE);
+  ASSERT_EQ(uv_translate_sys_error(UV_EACCES), UV_EACCES);
+  ASSERT_OK(uv_translate_sys_error(0));
+
+  return 0;
+}