error in class ResidualBlock(torch.nn.Module):??? In model.py

[renweiya]

def forward(self, x):
x = self.conv1(x)
x = self.bn1(x)
x = torch.nn.functional.relu(x)
x = self.conv2(x)
x = self.bn2(x)
x += x #may be a error?
x = torch.nn.functional.relu(x)
return x

def forward(self, x):
x = self.conv1(x)
x = self.bn1(x)
x1 = torch.nn.functional.relu(x)
x2 = self.conv2(x1)
x2 = self.bn2(x2)
x = x1+x2
x = torch.nn.functional.relu(x)
return x