--- a/mercurial/commands.py	Sun May 14 16:42:16 2017 +0900
+++ b/mercurial/commands.py	Thu May 04 17:13:12 2017 +0900
@@ -26,6 +26,7 @@
     changegroup,
     cmdutil,
     copies,
+    debugcommands as debugcommandsmod,
     destutil,
     dirstateguard,
     discovery,
@@ -59,6 +60,7 @@
 release = lockmod.release
 
 table = {}
+table.update(debugcommandsmod.command._table)
 
 command = registrar.command(table)