Drop instead of pop (#19503)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19503
After reading the arguments from the stack, the c10 kernel wrapper accidentally popped them again, causing a vector to be allocated.
Instead, it should just drop them because they have already been read.
Reviewed By: ezyang
Differential Revision: D15016023
fbshipit-source-id: b694a2929f97fa77cebe247ec2e49820a3c818d5
