bug#56553: 29.0.50; ASAN error with fringe bitmaps on NS

[Robert Pluim]

>>>>> On Fri, 15 Jul 2022 15:55:40 +0200, Gerd Möllmann 
>>>>> <gerd.moellmann@gmail.com> said:

    >> On 2022-07-15,, at 12:37 , Eli Zaretskii <eliz@gnu.org> wrote:
    >> 
    >>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
    >>> Date: Fri, 15 Jul 2022 11:14:02 +0200
    >>> Cc: Eli Zaretskii <eliz@gnu.org>,
    >>> 56553@debbugs.gnu.org
    >>> 
    >>> 
    >>>> On 2022-07-15,, at 10:23 , Po Lu <luangruo@yahoo.com> wrote:
    >>> 
    >>>> Yes, you're right here.  I think that code does want to access the
    >>>> individual bytes.
    >>> 
    >>> Interestingly, just doing
    >>> 
    >>> const char *bitmap_bytes = (const char *) bits;
    >>> bool bit = bitmap_bytes[byte] & (0x80 >> x % 8);
    >>> 
    >>> here results in garbage fringe bitmaps beign displayed.  I'm stumped.
    >> 
    >> Is the machine little-endian or big-endian?

    Gerd> Good question!  I think it's little-endian, but I'm not 100% sure. 

Both Intel and Arm based macs are little-endian

Robert
--