bug#59038: loading this base64 file makes emacs -Q 28.2 peg a core infinitely

[Gerd Möllmann]

Phil Sainty <psainty@orcon.net.nz> writes:

> On 2022-11-06 12:41, Gregory Heytings wrote:
>> That file opens just fine in other modes
>
> It also opens fine in c-mode, with global-font-lock-mode disabled.
>
>> Note that this bug has nothing to do with long lines.
>
> I imagine that the font-lock issue is related to the line being
> in excess of 21,000 chars (but general redisplay obviously doesn't
> have problems with lines this 'small').
>
> Reduced to 10,208 chars that file opens instantly under emacs -Q
> in c-mode with font-lock enabled; but at 10,209 chars it hangs
> Emacs (I killed it after waiting 4 minutes).

It could also be that this is not something with the position of size,
but with what's there at or around that position.  Just an idea.