small miaou_debug changes

poc

@@ -202,8 +202,8 @@ function on_pipe {
   unset 'error_source[-1]' 'error_lineno[-1]' 'error_funcname[-1]'
 
   load_tmp_error
-
   last_error="${tmp_error[-1]}"
+
   regex='^(.*): line ([0-9]+): miaou_error: SUBSHELL_ERROR ([0-9]+) payload: (.*)$'
   if [[ $last_error =~ $regex ]]; then
     source=${BASH_REMATCH[1]}
@@ -211,6 +211,7 @@ function on_pipe {
     failure_code=${BASH_REMATCH[3]}
     failure_payload=${BASH_REMATCH[4]}
     failure_type="SUBSHELL_ERROR"
+    miaou_debug "<subshell_error payload={${failure_payload}}"
     error_source=("$source" "${error_source[@]}")
     error_lineno=("$lineno" "${error_lineno[@]}")
     error_funcname=("${error_funcname[@]}" '<main>')
@@ -218,7 +219,7 @@ function on_pipe {
     failure_code=141
     failure_type="PIPE_ERROR"
   fi
-  miaou_debug "</on_pipe/>"
+  miaou_debug "</on_pipe>"
   builtin exit "$failure_code"
 }
 
@@ -340,7 +341,7 @@ function on_exit {
 
         unset 'tmp_error[-1]'
         add_miaou_error "${BASH_SOURCE[1]}" "${BASH_LINENO[0]}" "${failure_code}" "${failure_type}" "${failure_payload}"
-        miaou_debug "<unbound_variable source=${source} line=${line} payload={${failure_payload}}/>"
+        miaou_debug "<unbound_variable source=${source} line=${line} payload=${failure_payload}/>"
       else
         failure_type='UNKNOWN ERROR'
       fi
@@ -354,7 +355,7 @@ function on_exit {
     2>&3 >&4 dump_stacktrace
   fi
   if [[ $code -gt 0 ]]; then
-    miaou_debug "</on_exit exit=$code>"
+    miaou_debug "</on_exit failure>"
   else
     miaou_debug "</on_exit success>"
   fi
@@ -374,11 +375,9 @@ trap 'on_exit $?' EXIT
 trap 'on_pipe' PIPE
 trap 'on_return' RETURN
 
-declare -a tmp_error # to prevent loading multiple times
-
 if [[ -e /proc/$$/fd/3 ]]; then exec 4>&3 3>&-; else exec 4>/dev/tty; fi # swap fd 3 4 when fd 3 sent off
 exec 3>/dev/stderr 2>"$MIAOU_BASH_ERROR"
 
-miaou_debug "<source from=$BASH_ARGV0 pid=${BASHPID}/>"
+miaou_debug "<source file=$BASH_ARGV0 pid=${BASHPID}/>"
 # shellcheck source=/dev/null
 source "$BASH_ARGV0"