trap any error

src/main

@@ -3,6 +3,20 @@
 ## FUNCTIONS
 ## ---------
 
+function trap_error(){
+     error_code=$1
+     error_line=$2
+ 
+     printf "\nEXIT #${error_code} due to error at line ${error_line} : \n-----------------------------------------\n"
+     sed "${error_line}q;d" $0
+     echo
+     exit $error_code
+}
+
+set -e
+trap 'trap_error $? $LINENO' ERR
+
+
 function runVoid(){
     local COMMAND="$@"
     bash -c "${COMMAND}" >/dev/null 2>&1
@@ -225,6 +239,8 @@ for addon_id in "${!FIREFOX_ADDONS[@]}"; do
     fi
 done
 
+
+
 echo
 echo
 echo "# DEBIAN-GNOME successfully installed!"