--- a/mercurial/commands.py	Wed Mar 09 10:47:33 2016 -0500
+++ b/mercurial/commands.py	Tue Apr 12 03:40:53 2016 -0700
@@ -3063,29 +3063,22 @@
                              'node identifiers')
 
     if opts.get('delete'):
-        try:
-            indices = [int(v) for v in opts.get('delete')]
-        except ValueError:
-            raise error.Abort(_('invalid index value'),
-                              hint=_('use integers fro indices'))
+        indices = []
+        for v in opts.get('delete'):
+            try:
+                indices.append(int(v))
+            except ValueError:
+                raise error.Abort(_('invalid index value: %r') % v,
+                                  hint=_('use integers for indices'))
 
         if repo.currenttransaction():
-            raise error.Abort(_('Cannot delete obsmarkers in the middle '
+            raise error.Abort(_('cannot delete obsmarkers in the middle '
                                 'of transaction.'))
 
-        w = repo.wlock()
-        l = repo.lock()
-        try:
-            tr = repo.transaction('debugobsolete')
-            try:
-                n = repo.obsstore.delete(indices)
-                ui.write(_('Deleted %i obsolescense markers\n') % n)
-                tr.close()
-            finally:
-                tr.release()
-        finally:
-            l.release()
-            w.release()
+        with repo.lock():
+            n = repo.obsstore.delete(indices)
+            ui.write(_('deleted %i obsolescense markers\n') % n)
+
         return
 
     if precursor is not None:

--- a/mercurial/obsolete.py	Wed Mar 09 10:47:33 2016 -0500
+++ b/mercurial/obsolete.py	Tue Apr 12 03:40:53 2016 -0700
@@ -629,7 +629,7 @@
         return len(new)
 
     def delete(self, indices):
-        """Delete some obsmarkers from store and return the number of them
+        """Delete some obsmarkers from store and return how many were deleted
 
         Indices is a list of ints which are the indices
         of the markers to be deleted."""

--- a/tests/test-obsolete.t	Wed Mar 09 10:47:33 2016 -0500
+++ b/tests/test-obsolete.t	Tue Apr 12 03:40:53 2016 -0700
@@ -1106,18 +1106,17 @@
   $ hg debugobsolete --index --rev "3+7"
   1 6fdef60fcbabbd3d50e9b9cbc2a240724b91a5e1 d27fb9b066076fd921277a4b9e8b9cb48c95bc6a 0 \(.*\) {'user': 'test'} (re)
   3 4715cf767440ed891755448016c2b8cf70760c30 7ae79c5d60f049c7b0dd02f5f25b9d60aaf7b36d 0 \(.*\) {'user': 'test'} (re)
-  $ cd ..
-  $ cd ..
 
 Test the --delete option of debugobsolete command
-  $ hg init dorepo
-  $ cd dorepo
-  $ echo a > a && hg ci -Am a
-  adding a
-  $ hg ci --amend -m aa
+  $ hg debugobsolete --index
+  0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b f9bd49731b0b175e42992a3c8fa6c678b2bc11f1 0 \(.*\) {'user': 'test'} (re)
+  1 6fdef60fcbabbd3d50e9b9cbc2a240724b91a5e1 d27fb9b066076fd921277a4b9e8b9cb48c95bc6a 0 \(.*\) {'user': 'test'} (re)
+  2 1ab51af8f9b41ef8c7f6f3312d4706d870b1fb74 29346082e4a9e27042b62d2da0e2de211c027621 0 \(.*\) {'user': 'test'} (re)
+  3 4715cf767440ed891755448016c2b8cf70760c30 7ae79c5d60f049c7b0dd02f5f25b9d60aaf7b36d 0 \(.*\) {'user': 'test'} (re)
+  $ hg debugobsolete --delete 1 --delete 3
+  deleted 2 obsolescense markers
   $ hg debugobsolete
-  cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b f9bd49731b0b175e42992a3c8fa6c678b2bc11f1 0 (.*) {'user': 'test'} (re)
-  $ hg debugobsolete --delete 0
-  Deleted 1 obsolescense markers
-  $ hg debugobsolete
+  cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b f9bd49731b0b175e42992a3c8fa6c678b2bc11f1 0 \(.*\) {'user': 'test'} (re)
+  1ab51af8f9b41ef8c7f6f3312d4706d870b1fb74 29346082e4a9e27042b62d2da0e2de211c027621 0 \(.*\) {'user': 'test'} (re)
   $ cd ..
+