diff -r b47fef6d2365 -r b11e8c67fb0f mercurial/scmutil.py
--- a/mercurial/scmutil.py	Sun Jul 16 02:20:06 2017 +0200
+++ b/mercurial/scmutil.py	Sun Jul 16 02:33:14 2017 +0200
@@ -1081,6 +1081,7 @@
             fp.write(''.join(lines))
 
 _reportobsoletedsource = [
+    'debugobsolete',
     'pull',
     'push',
     'serve',