[cherry-pick] ignore ptc
[cherry-pick] ignore ptc

guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview,guicho271828/2017-6-14-aist-interview