`set -x` showing lines from zshrc

I am using zsh-git-prompt

When I use set -x to debug a command it output some extra lines.

Code:% set -x
+precmd_update_git_vars:1> [ -n '' ']'
+precmd_update_git_vars:1> [ '!' -n '' ']'
+precmd_update_git_vars:2> update_current_git_vars
+update_current_git_vars:1> unset __CURRENT_GIT_STATUS
+update_current_git_vars:3> [[ python == python ]]
+update_current_git_vars:4> _GIT_STATUS=+update_current_git_vars:4> python /home/ismail/zshfiles/gitstatus.py
+update_current_git_vars:4> _GIT_STATUS=''
+update_current_git_vars:6> __CURRENT_GIT_STATUS=( '' )
+update_current_git_vars:7> GIT_BRANCH=''
+update_current_git_vars:8> GIT_AHEAD=''
+update_current_git_vars:9> GIT_BEHIND=''
+update_current_git_vars:10> GIT_STAGED=''
+update_current_git_vars:11> GIT_CONFLICTS=''
+update_current_git_vars:12> GIT_CHANGED=''
+update_current_git_vars:13> GIT_UNTRACKED=''
+precmd_update_git_vars:3> unset __EXECUTED_GIT_COMMANDWhat might be causing it?

I have created an issue but I think something is wrong with my configuration. I am saying this because I am also having the same issue with z.plugin.zsh

Do, anyone have any idea regarding this issue?