@oushu1zhangxiangxuan1 Good improvement, thanks!

Could you update commit message like this:

fixed bug: implicit parameter name 

fixed #519

Note the blank line in the middle and update the pull-request title at the same time.

@javeme oh I'm sorry，I've been busy on my working these days

@oushu1zhangxiangxuan1 It's ok, look forward your further contributions.

ps. @github seems to have a bug, the author has been changed to me after merged, I have already fedback this issue to them.

@oushu1zhangxiangxuan1 Regarding the change of author information, Github's response is as follows, apologies for for it.