be a little more relaxed about temping in assignments (looks like some things...

be a little more relaxed about temping in assignments (looks like some things still can't be moved to a temp...)

Cython/Compiler/Nodes.py

@@ -4640,7 +4640,8 @@ class SingleAssignmentNode(AssignmentNode):
             dtype = self.lhs.type
 
         self.rhs = self.rhs.coerce_to(dtype, env)
-        if use_temp or not self.rhs.is_name:
+        if use_temp or self.rhs.is_attribute or (
+                not self.rhs.is_name and self.rhs.type.is_pyobject):
             # things like (cdef) attribute access are not safe (traverses pointers)
             self.rhs = self.rhs.coerce_to_temp(env)
         elif self.rhs.type.is_pyobject:
@@ -4684,10 +4685,10 @@ class CascadedAssignmentNode(AssignmentNode):
         from ExprNodes import CloneNode, ProxyNode
 
         rhs = self.rhs.analyse_types(env)
-        if rhs.is_name:
-            rhs = rhs.coerce_to_simple(env)
-        else:
+        if use_temp or self.rhs.is_attribute or self.rhs.type.is_pyobject:
             rhs = rhs.coerce_to_temp(env)
+        elif rhs.is_name:
+            rhs = rhs.coerce_to_simple(env)
         self.rhs = ProxyNode(rhs)
 
         self.coerced_rhs_list = []