On 2018-10-27 08:18:12 +0200, Fabien COELHO wrote:
>
> Hello Jeff,
>
> > > I suspect the easiest thing to narrow it down would be to bisect the
> > > problem in gcc :(
> >
> > Their commit r265241 is what broke the PostgreSQL build. It also broke the
> > compiler itself--at that commit it was no longer possible to build itself.
> > I had to --disable-bootstrap in order to get a r265241 compiler to test
> > PostgreSQL on.
>
> It seems they have done a API change around some kind of "range" analysis,
> which must have been incomplete.
>
> > Their commit r265375 fixed the ability to compile itself, but built
> > PostgreSQL binaries remain broken there and thereafter.
> >
> > |...]
>
> Thanks a lot for this investigation! I can fill in a gcc bug report. There
> would be a enormous work to narrow it down to a small test case, it is
> unclear how they can act about it, but at least they would know.
Have you done so? If so, what's the bug number?
Greetings,
Andres Freund
