On Sat, 17 Aug 2019 20:29:22 +0300 Eli Zaretskii <eliz@gnu.org> wrote:

>> From: Stephen Berman <stephen.berman@gmx.net>
>> Cc: handa@gnu.org,  cedric.chepied@gmail.com,  14461@debbugs.gnu.org,
>>   larsi@gnus.org
>> Date: Sat, 17 Aug 2019 19:05:20 +0200
>>
>> Executing this:
>>
>> $ hb-view /usr/share/fonts/dejavu/DejaVuSansMono.ttf -u 'U+061, U+301, U+302'
>>
>> displays just 'a' with an acute accent over it, i.e. the circumflex is
>> not displayed at all
>
> I don't think this is true, I think the accents are overlaid in a way
> that makes them hard to distinguish.  Try zooming in, if you can.

I find the displays quite unambiguous; here is the output as SVG images: