fs.realpathSync does not behave expected

[siaeyy]

Version

26.0.0-pre

Platform

archlinux x86_64

Subsystem

fs

What steps will reproduce the bug?

mkdir -p folder/nested/
ln -s folder/nested/ ./symlink-dir

const fs = require("fs");
const assert = require("assert");

const a = fs.realpathSync('./symlink-dir/..');
const b = fs.realpathSync('./folder');

assert.equal(a, b);

How often does it reproduce? Is there a required condition?

Always

What is the expected behavior? Why is that the expected behavior?

Expected behavior is same as native realpath:

$ realpath ./symlink-dir/..
/folder
$ realpath ./folder
/folder

What do you see instead?

AssertionError

Additional information

Refs: #60715, #60715 (comment)