tree 721461c94e831f12d2a1a4fed0c37c168df6efcd
parent 26f8a83622b5652ed9a7131e737821af7989f6ca
author Haoming Zhang <zhm1993zhm@gmail.com> 1498866834 -0700
committer Haoming Zhang <zhm1993zhm@gmail.com> 1498866834 -0700

add test, fix bugs