debian i386 test failure

[stevengj]

https://buildd.debian.org/status/fetch.php?pkg=libctl&arch=i386&ver=4.3.0-1&stamp=1557425610&raw=0 is seeing:

FAIL: test-prism
================

point inclusion: 0/10000 points failed (4 adjusted)
1/1000 segments failed
FAIL test-prism (exit status: 1)

with libctl 4.3.

cc @HomerReid

[stevengj]

I can reproduce if I simply run the test a lot of times:

for i in `seq 1 1000`; do utils/test-prism; done

so it looks like there is a small probability of test failure, maybe due to some roundoff error.

[anthmanni]

@stevengj any luck resolving this issue?