clone: fall back to pull source repo cannot be locked,
937ee88da3ef was a noop
937ee88da3ef was a noop, it was missing the wait keyword
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
created new head
% should abort
abort: crosses branches (use 'hg merge' or 'hg update -C' to discard changes)
% should succeed
abort: crosses branches (use 'hg merge' or 'hg update -C')