静态图报错:imperative_utils.h:145

imperative_utils.h:145] Operator _random_normal inferring shapes failed.
input shapes:
output shapes:
[-1,3,512,960]
operator attributes:
ctx : cpu(0)
shape : [0, 3, 512, 960]
scale : 1
loc : 0
*** Check failure stack trace: ***

请问这个是什么原因?