message: Fix shell loop in docker.
diff: @@ -38,10 +38,10 @@ do
  -w failed.list \
  "./swoole_${dir}"
  - for i in {1..5}
  + for i in 1 2 3 4 5
  do
  if [ "`cat failed.list | grep "phpt"`" ]; then
  - sleep 3
  + sleep ${i}
  echo "retry#${i}..."
  retry_failures
  else
  