A bug in FuzzyCommand

[zhixiao-zhang]

FuzzyCommand only works with user-defined commands. When executed with built-in commands, such as quit, it results in an error message.

The problem is caused by these two lines:

    var info = split(execute(':filter /\<' .. command .. '\>/ command ' .. command), '\n')[-1]
    var nargs = split(matchstr(info, '\<' .. command .. '\>\s\+\S'), '\s\+')[-1]

Refer to the help doc of command:

:com[mand] :com :command
List all user-defined commands.

When a built-in command is passed to it, it will return '', which leading to an out-of-range error. I'm not sure how to fix this, as vim doesn't provide a command-like cmd for built-in ones.

[mmrwoods]

Thanks for reporting and explaining clearly, fixed by handling user-defined and built-in commands separately