From a33c08d03cde85d7b3fe6ccafa5838f0c10d5b30 Mon Sep 17 00:00:00 2001
From: pvincent <pvincent@artcode.re>
Date: Sun, 26 Jul 2026 12:56:26 +0400
Subject: [PATCH] failure_type early detection

---
 poc                     | 21 +++++++++++++--------
 test/stub/scenario.bash |  1 +
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/poc b/poc
index b9f7144..f48eaa0 100755
--- a/poc
+++ b/poc
@@ -13,14 +13,15 @@ function is_true {
 }
 
 function miaou_debug {
-  is_true "${MIAOU_DEBUG}" && >/dev/tty builtin echo -e "\e[90mDEBUG <==> \e[95m$*\e[0m" || true
+  is_true "${MIAOU_DEBUG}" && >/dev/tty builtin echo -e "\r\e[90mDEBUG <==> \e[95m$*\e[0m" || true
 }
 
 function on_error {
   code="${1:-100}"
-  miaou_debug on_error: $$ $BASHPID
+  miaou_debug "on_error: $code ($$ -- $BASHPID)"
   if [[ $$ == "$BASHPID" ]]; then
     >&2 echo "${BASH_SOURCE[1]}: line ${BASH_LINENO[0]}: command_error: ${code}"
+    failure_type="COMMAND_ERROR"
     exit "$code"
   else
     >&2 echo "${BASH_SOURCE[1]}: line ${BASH_LINENO[0]}: subshell_error: ${code}"
@@ -28,16 +29,20 @@ function on_error {
   fi
 }
 
-function on_exit {
-  code="${1:-0}"
-
+function dump_stderr {
+  >&2 printf '' # flush
   miaou_debug --stderr--
   mapfile -t tmp_error <"$MIAOU_BASH_ERROR"
   for i in "${tmp_error[@]}"; do >&4 echo -e "$i"; done
-  last_error="${tmp_error[-1]}"
   miaou_debug --end of stderr--
+}
+
+function on_exit {
+  code="${1:-0}"
+  failure_type="${failure_type:-UNDEFINED}"
 
-  miaou_debug "on_exit $code"
+  dump_stderr
+  miaou_debug "on_exit $code $failure_type"
 }
 
 function on_pipe {
@@ -47,7 +52,7 @@ function on_pipe {
   mapfile -t tmp_error <"$MIAOU_BASH_ERROR"
   last_error="${tmp_error[-1]}"
   regex='.*: line [0-9]+: subshell_error: ([0-9]+)'
-  [[ $last_error =~ $regex ]] && code=${BASH_REMATCH[1]}
+  [[ $last_error =~ $regex ]] && code=${BASH_REMATCH[1]} && failure_type="SUBSHELL_ERROR"
 
   miaou_debug on_pipe: "${code}"
   exit "$code"
diff --git a/test/stub/scenario.bash b/test/stub/scenario.bash
index 01f132b..84d32de 100755
--- a/test/stub/scenario.bash
+++ b/test/stub/scenario.bash
@@ -16,6 +16,7 @@ function do_subshell_term {
 
   echo toto
   # echo 'toto' | grep none
+  # echo 'toto' | return 3
 
   echo -n "found1=$(grep nope nope)"
   echo "found1=$(grep nope nope | grep none)"