bug#49534: [External] : Re: bug#49534: 26.3; Isearch should support using filter predicates with empty search hits

[Juri Linkov]

>> All these changes fixed the test case that you
>> presented in the bug report.
>
> Yes, I understand that.  You've said that.  
> But that doesn't help me understand the code.
>
> Could you please answer the specific questions
> I asked about the code?  That will help me
> understand what's going on.
>
> I'm in no way arguing that your fix is in some
> way incorrect or insufficient.  I'm just trying
> to understand the code here.
>
> I'd appreciate this; thx.

If I designed a new function from scratch then I could explain all
decisions made while implementing it.  But I only fixed a few places
in the existing function just to pass test cases that you reported.