Add check for second value in sum: Logsumexp

tests/fixtures/misc/checker/logsumexp.py

@@ -12,3 +12,4 @@
 y = torch.log(2 + x)
 y = torch.sum(torch.log(torch.exp(x)), 1)
 y = torch.exp(torch.sum(torch.log(x), 1, keepdim=True))
+y = torch.log(torch.sum(torch.exp(2.5)))

torchfix/visitors/misc/__init__.py

@@ -183,7 +183,7 @@ def visit_Call(self, node):
                             node.args[0].value.args[0].value
                         )
                         == "torch.exp"
-                    ):
+                    ) and len(node.args[0].value.args) > 1 and node.args[0].value.args[1].value is not None:
                         self.add_violation(
                             node,
                             error_code=self.ERRORS[0].error_code,