On Sat, Mar 24, 2018 at 07:33:45AM +0100, Nguyễn Thái Ngọc Duy wrote:

This field is only need for pack-bitmap, which is an optional
feature. Move it to a separate array that is only allocated when
pack-bitmap is used (it's not freed in the same way that objects[] is
not).

I had trouble parsing the parenthetical in the last sentence. It does
make sense if you read it hard enough, but maybe:

  (like objects[], it is not freed, since we need it until the end of
  the process)

would be more clear?

The patch itself seems OK.

-Peff