No path completion on zsh 5.9

[wintermute-cell]

Describe the bug
There is no path completion when using glow <tab> on zsh.

I have (hopefully correctly) set up the completion file:

glow completion zsh > ~/.config/zsh/completion_files/_glow
echo "fpath=(~/.config/zsh/completion_files $fpath) >> ~/.zshrc

Setup

~ % zsh --version
zsh --version
zsh 5.9 (x86_64-pc-linux-gnu)
~ % glow --version
glow --version
glow version 1.5.1 (ad21129)

[Laura7089]

I'm also having this problem:

zsh 5.9
glow version 1.5.1 (ad21129)

[mattcargile]

Probably related to the cobra config in there source. See below.
#512