--- a/hgext/evolve.py	Thu Nov 20 15:34:34 2014 -0800
+++ b/hgext/evolve.py	Thu Nov 20 15:49:52 2014 -0800
@@ -2776,10 +2776,10 @@
     origmarkers = repo.obsstore._all
     known = set()
     markers = []
-    for m in markers:
+    for m in origmarkers:
         if m in known:
             continue
-        know.add(m)
+        known.add(m)
         markers.append(m)
     ui.write(_('Old store is version %d, will rewrite in version %d\n') % (
         repo.obsstore._version, new_format))

--- a/tests/test-obsconvert.t	Thu Nov 20 15:34:34 2014 -0800
+++ b/tests/test-obsconvert.t	Thu Nov 20 15:49:52 2014 -0800
@@ -15,15 +15,51 @@
   > done
 
 Test conversion between obsolete marker formats
+  $ hg debugobsolete
+  e63c23eaa88ae77967edcf4ea194d31167c478b0 b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 0 (*) {'user': 'test'} (glob)
+  a5b276878fa564da042b4b9efef3713ceea20350 0 {e63c23eaa88ae77967edcf4ea194d31167c478b0} (*) {'user': 'test'} (glob)
+  b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 384fc811182687231962e486f23ea8c5bab7a2d3 0 (*) {'user': 'test'} (glob)
+  2291082406feb57d0f83b9b0a6777b6074f3fde6 0 {b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34} (*) {'user': 'test'} (glob)
+  384fc811182687231962e486f23ea8c5bab7a2d3 949d379b3c3bf051906bc3528c049cb536e2ec86 0 (*) {'user': 'test'} (glob)
+  1616bdbe82d3fd1fb7c4e068aee277835672ffdc 0 {384fc811182687231962e486f23ea8c5bab7a2d3} (*) {'user': 'test'} (glob)
+  949d379b3c3bf051906bc3528c049cb536e2ec86 f2e4c45b2a4a58ccf7ef6825b8fa5685873cd2f7 0 (*) {'user': 'test'} (glob)
+  8668d55aac650158bb510be6d47d21e3db9e5c75 0 {949d379b3c3bf051906bc3528c049cb536e2ec86} (*) {'user': 'test'} (glob)
   $ hg debugobsconvert --new-format 0
   Old store is version 1, will rewrite in version 0
   Done!
+  $ hg debugobsolete
+  e63c23eaa88ae77967edcf4ea194d31167c478b0 b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 0 (*) {'user': 'test'} (glob)
+  a5b276878fa564da042b4b9efef3713ceea20350 0 {e63c23eaa88ae77967edcf4ea194d31167c478b0} (*) {'user': 'test'} (glob)
+  b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 384fc811182687231962e486f23ea8c5bab7a2d3 0 (*) {'user': 'test'} (glob)
+  2291082406feb57d0f83b9b0a6777b6074f3fde6 0 {b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34} (*) {'user': 'test'} (glob)
+  384fc811182687231962e486f23ea8c5bab7a2d3 949d379b3c3bf051906bc3528c049cb536e2ec86 0 (*) {'user': 'test'} (glob)
+  1616bdbe82d3fd1fb7c4e068aee277835672ffdc 0 {384fc811182687231962e486f23ea8c5bab7a2d3} (*) {'user': 'test'} (glob)
+  949d379b3c3bf051906bc3528c049cb536e2ec86 f2e4c45b2a4a58ccf7ef6825b8fa5685873cd2f7 0 (*) {'user': 'test'} (glob)
+  8668d55aac650158bb510be6d47d21e3db9e5c75 0 {949d379b3c3bf051906bc3528c049cb536e2ec86} (*) {'user': 'test'} (glob)
   $ hg debugobsconvert --new-format 0
   abort: New format is the same as the old format, not upgrading!
   [255]
+  $ hg debugobsolete
+  e63c23eaa88ae77967edcf4ea194d31167c478b0 b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 0 (*) {'user': 'test'} (glob)
+  a5b276878fa564da042b4b9efef3713ceea20350 0 {e63c23eaa88ae77967edcf4ea194d31167c478b0} (*) {'user': 'test'} (glob)
+  b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 384fc811182687231962e486f23ea8c5bab7a2d3 0 (*) {'user': 'test'} (glob)
+  2291082406feb57d0f83b9b0a6777b6074f3fde6 0 {b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34} (*) {'user': 'test'} (glob)
+  384fc811182687231962e486f23ea8c5bab7a2d3 949d379b3c3bf051906bc3528c049cb536e2ec86 0 (*) {'user': 'test'} (glob)
+  1616bdbe82d3fd1fb7c4e068aee277835672ffdc 0 {384fc811182687231962e486f23ea8c5bab7a2d3} (*) {'user': 'test'} (glob)
+  949d379b3c3bf051906bc3528c049cb536e2ec86 f2e4c45b2a4a58ccf7ef6825b8fa5685873cd2f7 0 (*) {'user': 'test'} (glob)
+  8668d55aac650158bb510be6d47d21e3db9e5c75 0 {949d379b3c3bf051906bc3528c049cb536e2ec86} (*) {'user': 'test'} (glob)
   $ hg debugobsconvert --new-format 1
   Old store is version 0, will rewrite in version 1
   Done!
+  $ hg debugobsolete
+  e63c23eaa88ae77967edcf4ea194d31167c478b0 b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 0 (*) {'user': 'test'} (glob)
+  a5b276878fa564da042b4b9efef3713ceea20350 0 {e63c23eaa88ae77967edcf4ea194d31167c478b0} (*) {'user': 'test'} (glob)
+  b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 384fc811182687231962e486f23ea8c5bab7a2d3 0 (*) {'user': 'test'} (glob)
+  2291082406feb57d0f83b9b0a6777b6074f3fde6 0 {b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34} (*) {'user': 'test'} (glob)
+  384fc811182687231962e486f23ea8c5bab7a2d3 949d379b3c3bf051906bc3528c049cb536e2ec86 0 (*) {'user': 'test'} (glob)
+  1616bdbe82d3fd1fb7c4e068aee277835672ffdc 0 {384fc811182687231962e486f23ea8c5bab7a2d3} (*) {'user': 'test'} (glob)
+  949d379b3c3bf051906bc3528c049cb536e2ec86 f2e4c45b2a4a58ccf7ef6825b8fa5685873cd2f7 0 (*) {'user': 'test'} (glob)
+  8668d55aac650158bb510be6d47d21e3db9e5c75 0 {949d379b3c3bf051906bc3528c049cb536e2ec86} (*) {'user': 'test'} (glob)
 
 Test that the default is some reasonably modern format (first downgrade)
   $ hg debugobsconvert --new-format 0
@@ -32,3 +68,12 @@
   $ hg debugobsconvert
   Old store is version 0, will rewrite in version 1
   Done!
+  $ hg debugobsolete
+  e63c23eaa88ae77967edcf4ea194d31167c478b0 b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 0 (*) {'user': 'test'} (glob)
+  a5b276878fa564da042b4b9efef3713ceea20350 0 {e63c23eaa88ae77967edcf4ea194d31167c478b0} (*) {'user': 'test'} (glob)
+  b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34 384fc811182687231962e486f23ea8c5bab7a2d3 0 (*) {'user': 'test'} (glob)
+  2291082406feb57d0f83b9b0a6777b6074f3fde6 0 {b81ac6b9d2a55f9a7a6b90a006b1aab0568d6d34} (*) {'user': 'test'} (glob)
+  384fc811182687231962e486f23ea8c5bab7a2d3 949d379b3c3bf051906bc3528c049cb536e2ec86 0 (*) {'user': 'test'} (glob)
+  1616bdbe82d3fd1fb7c4e068aee277835672ffdc 0 {384fc811182687231962e486f23ea8c5bab7a2d3} (*) {'user': 'test'} (glob)
+  949d379b3c3bf051906bc3528c049cb536e2ec86 f2e4c45b2a4a58ccf7ef6825b8fa5685873cd2f7 0 (*) {'user': 'test'} (glob)
+  8668d55aac650158bb510be6d47d21e3db9e5c75 0 {949d379b3c3bf051906bc3528c049cb536e2ec86} (*) {'user': 'test'} (glob)