[racerd] don't fail on no receiver
[racerd] don't fail on no receiver

Reviewed By: ezgicicek

Differential Revision: D14279554

fbshipit-source-id: a39173f5e

jvillard/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer