socket/tst-shutdown failure on glibc-debian-ppc64

[Mark Wielaard]

Hi Tom (CC libc-alpha in case someone has an idea what is going on),

The glibc-debian-ppc64 builder is almost zero-fail. It is one-fail.
socket/tst-shutdown FAILs with:

error: xread.c:32: read of 8 bytes failed after 0: Invalid argument
error: 1 test failures

So one of the xreads in socket/tst-shutdown.c fails, but I cannot
figure out which one. The EINVAL seems to indicate that the fd is
invalid ("fd is attached to an object which is unsuitable for
reading").

Both do_test_shut_wr and do_test_shut_rdwr contain two xreads where
len = 8. Could you try debugging locally to see which one fails?

Thanks,

Mark