diff -r a828c7a7ace1 -r f32d4c7f8fb7 tests/test-topic-stack.t
--- a/tests/test-topic-stack.t	Mon Apr 20 00:05:05 2020 +0800
+++ b/tests/test-topic-stack.t	Fri May 08 18:22:26 2020 +0800
@@ -955,22 +955,37 @@
   
   continue splitting? [Ycdq?] c
 
+  $ hg debugobsolete
+  34679cfcccdd07565970b959c79428af9a5744e4 6a11ae6b0cde4d4952ed68e8077b9e3596d99548 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  20f7945d89a5e372b7548f766ebc800677856443 3c7bec987cd37ba12b83c01683e8609dd549c07b 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  952e24687ebc5f11743268f6f1c3f24fa83c7ddd 74979543bf1d6c0f75229991400f352a6fb3fddb 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  c9961f97c7b40b54b3c1922986675d6f38793014 d7bfa3d6ce36dfb917547246752f0c2a564fe33b 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  c7d60a180d05255e8c6ea50bce09d014015b7cdc 3ab2eedae500f52b6aa220bb8ce6e20732a8a6d1 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  6a11ae6b0cde4d4952ed68e8077b9e3596d99548 61700bf67137c724a72aa5f034e9187d2c5e7e47 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  3c7bec987cd37ba12b83c01683e8609dd549c07b 4bcfa5dd0945476ba938e8115e81ba367af3b573 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  74979543bf1d6c0f75229991400f352a6fb3fddb 1d84ec948370a2ac1a51f3ab27835e31d50c3407 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '16', 'operation': 'amend', 'user': 'test'}
+  1d84ec948370a2ac1a51f3ab27835e31d50c3407 f3328cd199dc389b850ca952f65a15a8e6dbc79b 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '4', 'operation': 'rebase', 'user': 'test'}
+  3ab2eedae500f52b6aa220bb8ce6e20732a8a6d1 907f7d3c2333082d62942ac3a47e466ce03d82b9 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '4', 'operation': 'rebase', 'user': 'test'}
+  3bfe800e04863d23f909f8d98848656b7b5a971a 662ff4ad29901b325a64c39f7850e3efaaeeccc5 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '4', 'operation': 'rebase', 'user': 'test'}
+  907f7d3c2333082d62942ac3a47e466ce03d82b9 b24bab30ac12f6124a52e74aaf46b7468e42526c 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '8', 'operation': 'amend', 'user': 'test'}
+  b24bab30ac12f6124a52e74aaf46b7468e42526c dde94df880e97f4a1ee8c5408254b429b3d90204 e7ea874afbd5c17aeee366d39a828dbcb01682ce 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '12', 'operation': 'split', 'user': 'test'}
   $ hg --config extensions.evolve= obslog --all
   o  dde94df880e9 (21) c_G
+  |    split(parent, content) from b24bab30ac12 using split by test (Thu Jan 01 00:00:00 1970 +0000)
   |
   | @  e7ea874afbd5 (22) c_G
-  |/
+  |/     split(parent, content) from b24bab30ac12 using split by test (Thu Jan 01 00:00:00 1970 +0000)
+  |
   x  b24bab30ac12 (20) c_G
-  |    split(parent, content) as dde94df880e9, e7ea874afbd5 using split by test (Thu Jan 01 00:00:00 1970 +0000)
+  |    amended(content) from 907f7d3c2333 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
   |
   x  907f7d3c2333 (18) c_G
-  |    amended(content) as b24bab30ac12 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
+  |    rebased(parent) from 3ab2eedae500 using rebase by test (Thu Jan 01 00:00:00 1970 +0000)
   |
   x  3ab2eedae500 (13) c_G
-  |    rebased(parent) as 907f7d3c2333 using rebase by test (Thu Jan 01 00:00:00 1970 +0000)
+  |    reauthored(user) from c7d60a180d05 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
   |
   x  c7d60a180d05 (6) c_G
-       reauthored(user) as 3ab2eedae500 using amend by test (Thu Jan 01 00:00:00 1970 +0000)
   
   $ hg export .
   # HG changeset patch