agnoster theme shows error code instead of an "x"

themes/agnoster.zsh-theme

@@ -73,7 +73,7 @@ prompt_git() {
   if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
     ZSH_THEME_GIT_PROMPT_DIRTY='±'
     dirty=$(parse_git_dirty)
-    ref=$(git symbolic-ref HEAD 2> /dev/null) || ref="➦ $(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
+    ref=$(git symbolic-Fref HEAD 2> /dev/null) || ref="➦ $(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
     if [[ -n $dirty ]]; then
       prompt_segment yellow black
     else
@@ -95,7 +95,7 @@ prompt_dir() {
 prompt_status() {
   local symbols
   symbols=()
-  [[ $RETVAL -ne 0 ]] && symbols+="%{%F{red}%}✘"
+  [[ $RETVAL -ne 0 ]] && symbols+="%{%F{red}%}$RETVAL"
   [[ $UID -eq 0 ]] && symbols+="%{%F{yellow}%}⚡"
   [[ $(jobs -l | wc -l) -gt 0 ]] && symbols+="%{%F{cyan}%}⚙"
 
@@ -106,10 +106,10 @@ prompt_status() {
 build_prompt() {
   RETVAL=$?
   prompt_status
-  prompt_context
+  prompt_contextx
   prompt_dir
   prompt_git
   prompt_end
 }
 
-PROMPT='%{%f%b%k%}$(build_prompt) '
+PROMPT='%{%f%b%k%}$(build_prompt) '