885         if not pctx:

   885         if not pctx:

   886             parents = ctx.parents()

   886             parents = ctx.parents()

   887             if len(parents) != 1:

   887             if len(parents) != 1:

   888                 return False

   888                 return False

   889             pctx = parents[0]

   889             pctx = parents[0]

   890         # ctx changes more files (not a subset of memworkingcopy)

   892         # ctx changes more files (not a subset of memworkingcopy)

   891         if not set(ctx.files()).issubset(set(memworkingcopy)):

   893         if not set(ctx.files()).issubset(set(memworkingcopy)):

   892             return False

   894             return False

   893         for path, content in pycompat.iteritems(memworkingcopy):

   895         for path, content in pycompat.iteritems(memworkingcopy):

   894             if path not in pctx or path not in ctx:

   896             if path not in pctx or path not in ctx: