1151 

  1152 Check that fold respects the allowunstable option

  1153   $ hg up 0bb66d4c1968

  1154   0 files updated, 0 files merged, 2 files removed, 0 files unresolved

  1155   $ mkcommit unstableifparentisfolded

  1156   created new head

  1157   $ glog -r "18::"

  1158   @  30:30ecefd67c0a@default(draft) add unstableifparentisfolded

  1159   |

  1160   | o  29:5a6c53544778@default(draft) add c5_

  1161   | |

  1162   +---o  20:db3d894869b0@default(draft) add gh

  1163   | |

  1164   | o  19:10ffdd7e3cc9@default(draft) add gg

  1165   |/

  1166   o  18:0bb66d4c1968@default(draft) a3

  1167   |

  1168 

  1169   $ hg fold --exact "19 + 18"

  1170   abort: cannot fold chain not ending with a head or with branching

  1171   [255]

  1172   $ hg fold --exact "18::29"

  1173   abort: cannot fold chain not ending with a head or with branching

  1174   [255]

  1175   $ hg fold --exact "19::"

  1176   2 changesets folded