remove duplication of type analysis for base type tuple of Python classes...

remove duplication of type analysis for base type tuple of Python classes (could crash the compiler for non-trivial base class expressions)

Cython/Compiler/ExprNodes.py

@@ -7148,7 +7148,6 @@ class PyClassNamespaceNode(ExprNode, ModuleNameMixin):
     subexprs = ['doc']
 
     def analyse_types(self, env):
-        self.bases = self.bases.analyse_types(env)
         if self.doc:
             self.doc = self.doc.analyse_types(env)
             self.doc = self.doc.coerce_to_pyobject(env)

tests/run/pyclass_dynamic_bases.pyx

+# mode: run
+# tag: pyclass
+
+class A(object):
+    x = 1
+
+class B(object):
+    x = 2
+
+
+def cond_if_bases(x):
+    """
+    >>> c = cond_if_bases(True)
+    >>> c().p
+    5
+    >>> c().x
+    1
+    >>> c = cond_if_bases(False)
+    >>> c().p
+    5
+    >>> c().x
+    2
+    """
+    class PyClass(A if x else B):
+        p = 5
+    return PyClass