bug#54646: 29.0.50; set-fontset-font and font clipping issues

[Visuwesh]

[ஞாயிறு அக்டோபர் 09, 2022] Po Lu via "Bug reports for GNU Emacs, the Swiss army 
knife of text editors" wrote:

> Visuwesh <visuweshm@gmail.com> writes:
>
>> Sorry about that.  All the separate issues eventually boiled down to
>> "Emacs has glyph misplacement issues for Tamil text."  The rest of the
>> issue was me figuring out if my config was introducing the misplacement
>> or whether it was a font issue, both of which aren't the case.  I can
>> reproduce it in emacs -Q and with any Tamil font I throw at Emacs.
>
> What if you run `clear-font-cache'?

It does not help.  Same with clear-composition-cache.