diff -r c96e4ab4e5cc -r 35518d26b549 hgext/evolve.py
--- a/hgext/evolve.py	Thu Jun 18 17:57:11 2015 -0700
+++ b/hgext/evolve.py	Thu Jun 18 23:45:37 2015 -0700
@@ -946,6 +946,11 @@
         return bookmarks.deactivate(repo)
     except AttributeError:
         return bookmarks.unsetcurrent(repo)
+def bmactivate(repo, book):
+    try:
+        return bookmarks.activate(repo, book)
+    except AttributeError:
+        return bookmarks.setcurrent(repo, book)
 
 def bmactive(repo):
     try:
@@ -1520,7 +1525,7 @@
         displayer.show(orig)
         repo.ui.write(_('atop:'))
         displayer.show(target)
-    if confirm and ui.prompt('perform evolve? [Ny]') != 'y':
+    if confirm and ui.prompt('perform evolve? [Ny]', 'n') != 'y':
             raise util.Abort(_('evolve aborted by user'))
     if progresscb: progresscb()
     todo = 'hg rebase -r %s -d %s\n' % (orig, target)
@@ -1558,7 +1563,7 @@
         displayer.show(bumped)
         repo.ui.write(_('atop:'))
         displayer.show(prec)
-    if confirm and ui.prompt('perform evolve? [Ny]') != 'y':
+    if confirm and ui.prompt('perform evolve? [Ny]', 'n') != 'y':
         raise util.Abort(_('evolve aborted by user'))
     if dryrun:
         todo = 'hg rebase --rev %s --dest %s;\n' % (bumped, prec.p1())
@@ -1691,7 +1696,7 @@
         displayer.show(other)
         ui.write(_('base: '))
         displayer.show(base)
-    if confirm and ui.prompt('perform evolve? [Ny]') != 'y':
+    if confirm and ui.prompt('perform evolve? [Ny]', 'n') != 'y':
         raise util.Abort(_('evolve aborted by user'))
     if dryrun:
         ui.write('hg update -c %s &&\n' % divergent)
@@ -2001,13 +2006,13 @@
                 # after
                 movebookmark = bookactive and not bookmark
                 if movebookmark:
-                    bookmarks.deactivate(repo)
+                    bmdeactivate(repo)
                     repo._bookmarks[bookactive] = newnode.node()
                     repo._bookmarks.write()
                 commands.update(ui, repo, newnode.rev())
                 ui.status(_('working directory now at %s\n') % newnode)
                 if movebookmark:
-                    bookmarks.activate(repo, bookactive)
+                    bmactivate(repo, bookactive)
 
         # update bookmarks
         if bookmark: