mend

lib/fs.js

@@ -1438,7 +1438,12 @@ function readdirSyncRecursive(basePath, options) {
     handleErrorFromBinding(ctx);
 
     if (withFileTypes) {
-      for (let i = 0; i < readdirResult[0].length; i++) {
+      // Calling `readdir` with `withFileTypes=true`, the result is an array of arrays.
+      // The first array is the names, and the second array is the types.
+      // They are guaranteed to be the same length; hence, setting `length` to the length
+      // of the first array within the result.
+      const length = readdirResult[0].length;
+      for (let i = 0; i < length; i++) {
         const dirent = getDirent(path, readdirResult[0][i], readdirResult[1][i]);
         ArrayPrototypePush(readdirResults, dirent);
         if (dirent.isDirectory()) {

test/sequential/test-fs-readdir-recursive.js

@@ -135,6 +135,7 @@ function assertDirents(dirents) {
   dirents.sort((a, b) => (getDirentPath(a) < getDirentPath(b) ? -1 : 1));
   for (const [i, dirent] of dirents.entries()) {
     assert(dirent instanceof fs.Dirent);
+    assert.notStrictEqual(dirent.name, undefined);
     assert.strictEqual(getDirentPath(dirent), expected[i]);
   }
 }