Fixed computing cache for pure ops

theano/gof/cc.py

@@ -925,7 +925,11 @@ class CLinker(link.Linker):
 
         version = []
         for node_pos, node in enumerate(order):
-            version.append(node.op.c_code_cache_version_apply(node))
+            try:
+                # Pure Ops do not have a c_code_cache_version_apply ...
+                version.append(node.op.c_code_cache_version_apply(node))
+            except AttributeError:
+                pass
             for i in node.inputs:
                 version.append(i.type.c_code_cache_version())
             for o in node.outputs: