Fixed special case for assignment overloading in cascaded assignment where

all left hand sides have the same type.

Cython/Compiler/Nodes.py

@@ -5088,8 +5088,14 @@ class CascadedAssignmentNode(AssignmentNode):
             lhs_types.add(lhs.type)
 
         rhs = self.rhs.analyse_types(env)
-        if len(lhs_types) == 1:
         # common special case: only one type needed on the LHS => coerce only once
+        if len(lhs_types) == 1:
+            # Avoid coercion for overloaded assignment operators.
+            if next(iter(lhs_types)).is_cpp_class:
+                op = env.lookup_operator('=', [lhs, self.rhs])
+                if not op:
+                    rhs = rhs.coerce_to(lhs_types.pop(), env)
+            else:
                 rhs = rhs.coerce_to(lhs_types.pop(), env)
 
         if not rhs.is_name and not rhs.is_literal and (