BUG: Attempts to recursively copy directory into child of itself

[Artemis21]

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Neovim Version (nvim -v)

NVIM v0.10.4

Operating System / Version

Fedora 41

Describe the Bug

If you copy a/ to a/b/, Neotree correctly refuses the command. However, if you copy a/ to a/b/c/, Neotree attempts to comply, resulting in recursion that ends in a filesystem error and a deeply nested file tree.

Related: #795

Screenshots, Traceback

Steps to Reproduce

1. Create a directory.
2. With the cursor over the directory in neotree, press c for copy.
3. In the resulting popup, enter b/c

Alternatively:

1. Create a directory a/ with a subdirectory a/b/.
2. With the cursor over a/, press y for yank.
3. With the cursor over a/b/, press p for paste.

Expected Behavior

Neotree refuses to copy a directory into itself or any descendants.

Your Configuration

vim.env.LAZY_STDPATH = ".repro"
load(vim.fn.system("curl -s https://raw.githubusercontent.com/folke/lazy.nvim/main/bootstrap.lua"))()

require("lazy.minit").repro({
  spec = {
    {
      "nvim-neo-tree/neo-tree.nvim",
      branch = "v3.x",
      dependencies = {
        "nvim-lua/plenary.nvim",
        "nvim-tree/nvim-web-devicons",
        "MunifTanjim/nui.nvim",
      },
      lazy = false,
      opts = {},
    }
  },
})
vim.g.mapleader = " "
vim.keymap.set("n", "<leader>e", "<Cmd>Neotree<CR>")