Apparently, On Sun, May 05, 2002 at 10:44:44AM +1000,
Bruce Evans said words to the effect of;
> On Sat, 4 May 2002, David O'Brien wrote:
> > On Sat, May 04, 2002 at 09:26:33PM +0100, Brian Somers wrote:
> > > Try disabling -pipe when building the compiler. This seems to make
> > > things more stable here (CFLAGS=-O in /etc/make.conf) - as if
> > > building the kernel with -pipe sometimes produces a kernel that
> > > subsequently murders the compiler with sig11/sig4 all the time.
> > If so, then we have a bug in our pipe ('|', not 'gcc -pipe')
> > implimentation.
> I have seen signs of a generic pipe bug in vi: vi's i/o buffer for
> pipes is sometimes invalid (kern/sys_pipe.c:pipe_build_write_buffer()
> gets an error faulting it in). This doesn't usually cause signals;
> it just confuses vi.
Can you try backing out rev 1.104 of kern/sys_pipe.c?
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