install/update display strange message.

[leomao]

Problem Summary

zplug install and zplug update will display Unknown error message.
But the installation/update is success actually.

System Information

• uname -a

Linux  4.8.13-1-ARCH #1 SMP PREEMPT Fri Dec 9 07:24:34 CET 2016 x86_64 GNU/Linux

• zsh version

zsh 5.3.1 (x86_64-unknown-linux-gnu)

• zplug version/commit

2e06c65

(current head)

Minimal zshrc

Create a minimal reproducing set of configurations for this issue. Please
remove all unnecessary parts!

source ~/.zplug/init.zsh
zplug "zsh-users/zsh-syntax-highlighting"
zplug check || zplug install
zplug load --verbose

Steps to Reproduce

1. remove ~/.zplug.
2. use the minimal .zshrc above.
3. curl -sL zplug.sh/installer | zsh to install the zplug.
4. open a new zsh and confirm to install plugins.
5. get the Unknown error message

Actual message is like following:

[zplug] Start to install 1 plugins in parallel

 ✘  Unknown error         zsh-users/zsh-syntax-highlighting

[zplug] Elapsed time: 2.8343 sec.
 ==> Installation finished successfully!
 Load "~/.zplug/repos/zsh-users/zsh-syntax-highlighting/zsh-syntax-highlighting.plugin.zsh" (zsh-users/zsh-syntax-highlighting)
[zplug] Run compinit
[8]  + done       { tags[as]="$(__zplug::core::core::run_interfaces 'as' "$repo")" ; case  in (     

[babarot]

Thank you for report, that is my bad. It is environment dependent bug. We will respond immediately. (related to #326)