Fix compiler crash for invalid C++ base classes.

CHANGES.rst

@@ -25,6 +25,14 @@ Bugs fixed
 
 * C++ class nesting was broken.
 
+* Better checking for required nullary constructors for stack-allocated C++ instances.
+
+* Remove module docstring in no-docstring mode.
+
+* Fix specialization for varargs function signatures.
+
+* Fix several compiler crashes.
+
 Other changes
 -------------
 

Cython/Compiler/Nodes.py

@@ -1206,7 +1206,12 @@ class CppClassNode(CStructOrUnionDefNode, BlockNode):
         scope = None
         if self.attributes is not None:
             scope = CppClassScope(self.name, env, templates = self.templates)
-        base_class_types = [b.analyse(scope or env) for b in self.base_classes]
+        def base_ok(base_class):
+            if base_class.is_cpp_class or base_class.is_struct:
+                return True
+            else:
+                error(self.pos, "Base class '%s' not a struct or class." % base_class)
+        base_class_types = filter(base_ok, [b.analyse(scope or env) for b in self.base_classes])
         if self.templates is None:
             template_types = None
         else: