_arguments:450:

  question, vim

When vim is edited, the tab key displays this line. What is the situation?

➜  ~ vim ./
 _arguments:450: _vim_files: function definition file not found
 _arguments:450: _vim_files: function definition file not found
 _arguments:450: _vim_files: function definition file not found
 ➜  ~ vim ./

Try deleting ~/.zcompdump.