diff --git a/ext_open/searcher.py b/ext_open/searcher.py
index 028bbbe..44393ad 100644
--- a/ext_open/searcher.py
+++ b/ext_open/searcher.py
@@ -62,6 +62,7 @@ class Searcher:
             args = ['python',UPDATE_PY,self.ext]
             if update_mtimes:
                 args.append('-m')
+            # subprocess.check_output(args)
             self.update_proc = subprocess.Popen(args)
 
     def commit(self):
diff --git a/ext_open/update.py b/ext_open/update.py
index 17ae064..813d70e 100644
--- a/ext_open/update.py
+++ b/ext_open/update.py
@@ -32,14 +32,14 @@ def build(after,starts):
     for path in starts:
         for root,dirs,files in os.walk(path,topdown=True):
             try:
-                ignore = any('__ignore__' in files)
+                ignore = '__ignore__' in files
                 if ignore:
-                    del dirs
+                    dirs[:] = []
                 else:
                     for file in files:
                         yield os.path.join(root,file)
                     dirs[:] = list(filter(lambda p: osp.getmtime(osp.join(root,p)) > after,dirs))
-            except:
+            except Exception as e:
                 print('Error',root,sep= ': ')
 
 def _update(ext,starts,after,do_update_mtimes = False):