E944 when opening a file in a directory named "[a-1]"

[cwfoo]

Describe the bug

When trying to open a file that is inside a directory named "[a-1]", an error occurs: E944: Reverse range in character class.

Steps to reproduce

1. cd ~
2. mkdir '[a-1]'
3. vim '[a-1]/blabla.txt'
   An error occurs:

   Error detected while processing function gutentags#setup_gutentags[38]..gutentags#get_project_root[4]..gutentags#default_get_project_root:
   line   15:
   E944: Reverse range in character class
   

Share your setup

• Ubuntu 20.04
• Vim 8.1.2269
• vim-gutentags 50705e8 (2020-05-22)

Post the logs

Irrelevant because no logs are produced.

Additional context

The problem is likely caused by calls to globpath() that fail to escape file wildcards (see :h wildcards) prior to globbing. Example of a problematic line:

vim-gutentags/autoload/gutentags.vim

Line 209 in 50705e8

if !empty(globpath(l:path, root, 1))

Perhaps the solution is to use fnameescape() to escape wildcard characters, but I don't know enough about these things to comment further.