Describe the bug

After updating to the latest oh-my-zsh, I started seeing the following error

(eval):6: parse error near `function'
(eval):6: parse error near `function'
(eval):6: parse error near `function'
(eval):6: parse error near `function'

every time the shell starts.

Steps to reproduce

1. Enable plugin tmux
2. Source .zshrc

Expected behavior

The startup should complete without errror

Screenshots and recordings

No response

OS / Linux distribution

Manjaro Linux

Zsh version

5.9

Oh My Zsh version

master (0c9b42a)

Terminal emulator

Alacritty

If using WSL on Windows, which version of WSL

None

Additional context

I've had a hard time reproducing this bug because it somehow stopped happening when I commented out other plugins, but now I have reduced my .zshrc to

export ZSH=$HOME/.oh-my-zsh
plugins=(
   tmux
)
echo "Change"
source $ZSH/oh-my-zsh.sh
echo "Oh-my-zsh done"

and with the echos to confirm that the error happening during the omz loading and I have deleted and recloned the omz folder to ensure that no custom config is messing with it.