rebase: backout changeset 986d04b9fedd

This is a dependency for a future backout of 88fde8db5307.

See the previous patches for why.

hgext/rebase.py

@@ -397,13 +397,14 b' def rebase(ui, repo, **opts):'
             if dest.closesbranch() and not keepbranchesf:
                 ui.status(_('reopening closed branch head %s\n') % dest)
 
-        if keepbranchesf and collapsef:
-            branches = set()
-            for rev in state:
-                branches.add(repo[rev].branch())
-                if len(branches) > 1:
-                    raise error.Abort(_('cannot collapse multiple named '
-                                        'branches'))
+        if keepbranchesf:
+            if collapsef:
+                branches = set()
+                for rev in state:
+                    branches.add(repo[rev].branch())
+                    if len(branches) > 1:
+                        raise error.Abort(_('cannot collapse multiple named '
+                            'branches'))
 
         # Rebase
         if not targetancestors: