trap any error

src/main

@@ -13,13 +13,13 @@ function trap_error(){
      exit $error_code
 }
 
-set -e
-trap 'trap_error $? $LINENO' ERR
 
 
 function runVoid(){
+    trap - ERR
     local COMMAND="$@"
     bash -c "${COMMAND}" >/dev/null 2>&1
+    trap 'trap_error $? $LINENO' ERR
     return $?
 }
 
@@ -63,6 +63,10 @@ REQUIRED_PACKAGES=( \
 
 [ `id -u` -eq 0 ] && echo 'normal user required' && exit -1
 
+echo "# updating repositories"
+echo "==================="
+sudo apt update
+
 
 echo "# required packages"
 echo "==================="