am 21af9a08: Merge "avoid multiple-"0" to exceed the length of upper bound"

# By Sungmin Choi
# Via Gerrit Code Review (1) and Sungmin Choi (1)
* commit '21af9a08465c4927aab9db30efdfcf5ee8f52410':
  avoid multiple-"0" to exceed the length of upper bound