--- a/checker.py	Sun Apr 12 23:54:41 2020 +0800
+++ b/checker.py	Sun Apr 12 23:56:27 2020 +0800
@@ -57,6 +57,7 @@
 def run_hg(args, **kwargs):
     env = kwargs.pop('env', {})
     env.update({'HGPLAIN': '1'})
+    env.update({'HGENCODING': 'UTF-8'})
     return run(['hg'] + args, env=env, **kwargs)