improved miaou_debug on_error

test/poc.test.bash

@@ -43,11 +43,13 @@ function fail_type {
 set -uo pipefail
 
 assert success
+
 fail_type subshell_term SUBSHELL_ERROR
 fail_type unbound_variable UNBOUND_VARIABLE
 fail_type unbound_associative UNBOUND_VARIABLE
 fail_type false FALSE
-fail_type return RETURN
+fail_type last_false COMMAND_ERROR
+fail_type subshell_term SUBSHELL_ERROR
 fail_type exit EXIT
 fail_type command_not_found COMMAND_NOT_FOUND
 # fail_type source_not_found SOURCE_NOT_FOUND

test/stub/scenario.bash

@@ -28,8 +28,9 @@ function do_subshell_term {
   # echo SHOULD NOT SHOW UP!
 }
 
+# unable to catch up error when the last command is `!` statement
 function do_last_false {
-  # FIXME: provides error detection
+  echo 'last false'
   ! true
 }