Comment # 10 on bug 1018908 from Michael Matz

(In reply to Richard Palethorpe from comment #8)
> Well, I think I now know the change which stopped the test from passing,
> from the same file with fresetlockfiles():

Hmm if that indeed changed anything something else is going on.  As noted
fresetlockfiles only worked for locks that weren't explicitly created by the
user, so it's new position (now conditional under multiple_threads) shouldn't
make a difference for the test (because it, well, does create the lock
explicitly :) ).  But yeah, asking POSIX for clarification would be a good idea
IMHO.