完整错误
RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.cuda.FloatTensor [1, 3, 512, 512]] is at version 7; expected version 1 instead. Hint: enable anomaly detection to find the operation that failed to compute its gradient, with torch.autograd.set_detect_anomaly(True).
检查了好久，发现是代码不规范。
在调用函数时候，使用了这样的操作
x1 = self.build_fine2coarse(x1+aux_f)
改成这样就好了
x = x1+aux_f
x1 = self.build_fine2coarse(x)
这个错误，归根结底，就是避免inplace操作