fix according to comments

theano/gof/compiledir.py

@@ -351,25 +351,28 @@ def print_compiledir_content():
     for dir in os.listdir(compiledir):
         filename = os.path.join(compiledir, dir, "key.pkl")
         with open(filename, 'rb') as file:
-            keydata = pickle.load(file)
-            ops = list(set([x for x in flatten(keydata.keys)
-                            if isinstance(x, theano.gof.Op)]))
-            if len(ops) == 0:
-                zeros_op += 1
-            elif len(ops) > 1:
-                more_than_one_ops += 1
-            else:
-                types = list(set([x for x in flatten(keydata.keys)
-                                  if isinstance(x, theano.gof.Type)]))
-                table.append((dir, ops[0], types))
-
-            size = os.path.getsize(filename)
-            total_key_sizes += size
-            if size > max_key_file_size:
-                big_key_files.append((dir, size, ops))
-
-            nb_keys.setdefault(len(keydata.keys), 0)
-            nb_keys[len(keydata.keys)] += 1
+            try:
+                keydata = pickle.load(file)
+                ops = list(set([x for x in flatten(keydata.keys)
+                                if isinstance(x, theano.gof.Op)]))
+                if len(ops) == 0:
+                    zeros_op += 1
+                elif len(ops) > 1:
+                    more_than_one_ops += 1
+                else:
+                    types = list(set([x for x in flatten(keydata.keys)
+                                      if isinstance(x, theano.gof.Type)]))
+                    table.append((dir, ops[0], types))
+
+                size = os.path.getsize(filename)
+                total_key_sizes += size
+                if size > max_key_file_size:
+                    big_key_files.append((dir, size, ops))
+
+                nb_keys.setdefault(len(keydata.keys), 0)
+                nb_keys[len(keydata.keys)] += 1
+            except IOError:
+                pass
 
     print("List of %d compiled individual ops in this theano cache %s:" % (
         len(table), compiledir))