resolved strict aliasing problem by changing type cast

diff --git a/Cython/Compiler/ModuleNode.py b/Cython/Compiler/ModuleNode.py
index 40e31ca9de3d3e1aa0084f3086d552735008cb76..1bc6f3fe3bd956d6dac1ba6d06f71bd633c7a2e7 100644 (file)
--- a/Cython/Compiler/ModuleNode.py
+++ b/Cython/Compiler/ModuleNode.py
@@ -821,10 +821,13 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         #if need_self_cast:
         #      self.generate_self_cast(scope, code)
         if type.vtabslot_cname:
-            code.putln("*(struct %s **)&p->%s = %s;" % (
-                type.vtabstruct_cname,
+            if base_type:
+                struct_type_cast = "(struct %s*)" % base_type.vtabstruct_cname
+            else:
+                struct_type_cast = ""
+            code.putln("p->%s = %s%s;" % (
                 type.vtabslot_cname,
-                type.vtabptr_cname))
+                struct_type_cast, type.vtabptr_cname))
         for entry in py_attrs:
             if entry.name == "__weakref__":
                 code.putln("p->%s = 0;" % entry.cname)