bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs

[Gregory Heytings]

> > > Bisection requires to know the last commit where the bug didn't exist.
> >
> > Not the *last* commit, that what bisection is for to find out.  It just 
> > requires *any* commit where the bug didn't exist.
>
> Right, but that's unknown as well here.

Usually the first step in bisecting is to find some distant commit where 
the bug did not exist.