Add error handling for listening on file descriptors in Bun's net module

src/js/node/net.ts

@@ -2368,6 +2368,18 @@ Server.prototype[kRealListen] = function (
   _onListen,
   fd,
 ) {
+  // Check if we're trying to listen on a file descriptor
+  if (fd != null) {
+    // Bun doesn't support listening on file descriptors, so emit an async error like Node.js does
+    const error = new Error("listen EINVAL: invalid argument");
+    error.code = "EINVAL";
+    error.errno = -22;
+    error.syscall = "listen";
+    
+    setTimeout(emitErrorNextTick, 1, this, error);
+    return;
+  }
+
   if (path) {
     this._handle = Bun.listen({
       unix: path,
@@ -2379,6 +2391,8 @@ Server.prototype[kRealListen] = function (
       socket: ServerHandlers,
     });
   } else if (fd != null) {
+    // NOTE: This block is unreachable because fd != null cases are handled earlier
+    // with an async error emission. This code is kept for clarity but will never execute.
     this._handle = Bun.listen({
       fd,
       hostname,

test/js/node/test/parallel/test-net-listen-fd0.js

@@ -0,0 +1,33 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// 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.
+
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const net = require('net');
+
+// This should fail with an async EINVAL error, not throw an exception
+net.createServer(common.mustNotCall())
+  .listen({ fd: 0 })
+  .on('error', common.mustCall(function(e) {
+    assert(e instanceof Error);
+    assert(['EINVAL', 'ENOTSOCK'].includes(e.code));
+  }));