bug#52888: 29.0.50; font_{delete_unmatched,score} do not handle nil FONT_WEIGHT_INDEX

[Eli Zaretskii]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Date: Fri, 31 Dec 2021 17:30:35 -0700
> 
> If I might ask a gdb question: to try to determine when this code can
> set FONT_WEIGHT_INDEX to nil, I set a breakpoint right after it and then
> tried
> 
>     condition NN NILP (AREF (entity, FONT_WEIGHT_INDEX))
> 
> but this didn't work -- is it possible to do something like that?

It should be possible if your Emacs was compiled with -g3.
Perhaps try

  condition NN AREF (entity, FONT_WEIGHT_INDEX) == Qnil

instead.