On Mon, 10 Sep 2018, Martin Li¨ka wrote:
> I can reproduce that locally in a KVM machine running FreeBSD test 
> 10.4-RELEASE. I used gcc version 6.4.0 (FreeBSD Ports Collection) to 
> build stage1 compiler and I can see Segfaults happening.

Great, thanks for helping look into this, Martin!

> Issue is that neither valgrind nor gdb work on the system.
> Valgrind has 2 PRs reported:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224878
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228973
> 
> For the gdb I can't see any lines associated:

Which gdb are you using?  (`which gdb` and/or `gdb --version`?)

If, as I assume, it is the old one in the system (GDB 6.1.1) it
may be worth a try installing the one from the ports/packages.
Something like `pkg add gdb`, which should bring in GDB 8.1.1.

> Would be very handy to have at least one of these tools working.
> Gerald can you please help us with that?

I believe the GDB route is the more promising one (also having looked
at the two PRs you found re valgrind on FreeBSD/i386).  Quesiton is,
is it more of a GDB issue, or perhaps debugging information missing?

Let me know what you find, I may be able to ask others, closer to the
FreeBSD toolchain for help.

Gerald