bug#34801: "make check" of grep 3.1 "backref-alt" was passed

[William Li]

To GNU Grep Bug team,

I was building grep 3.1 for Linux From Scratch 8.3 Chapter 5.25 when the
test suite(make check) returned one "XPASS." I was told by the suite to
make a bug report and here it is.

I am running Windows 7 64-bit with VirtualBox 52.22
I've allocated the box 2G of RAM and 2 2GHz cores.
Inside the box, it is Ubuntu 18.04 64-bit.

Since I am running the whole thing inside a virtual box, it is hard for me
to email the actual log contents(I am writing from outside). Let me know if
you need the test-suite.log file.

Best Regards,

William