Update block.py

ultralytics/nn/modules/block.py

@@ -235,6 +235,12 @@ class C2f(nn.Module):
 
     def forward(self, x):
         """Forward pass through C2f layer."""
+        y = list(self.cv1(x).chunk(2, 1))
+        y.extend(m(y[-1]) for m in self.m)
+        return self.cv2(torch.cat(y, 1))
+
+    def forward_fx(self, x):
+        """Forward pass creating list explictly instead of using list()."""
         y1 = self.cv1(x).chunk(2, 1)
         y = [y1[0], y1[1]]
         y.extend(m(y[-1]) for m in self.m)