[Beignet] Still getting "Failed to release test userptr object! (9) i915 kernel driver may not be sane!"

[Rebecca N. Palmer]

I also have an i5-3230M, and get the same error in my build chroots 
(Debian sid = libdrm 2.4.64) but not my base system (Debian jessie = 
libdrm 2.4.58); I have not attempted to determine whether the problem is 
the version or being in a chroot.