"""
Test that we keep references to failinfo as needed.
"""
import fiu
# Object we'll use for failinfo
finfo = [1, 2, 3]
fiu.enable("p1", failinfo=finfo)
assert fiu.fail("p1")
assert fiu.failinfo() is finfo
finfo_id = id(finfo)
del finfo
assert fiu.failinfo() == [1, 2, 3]
assert id(fiu.failinfo()) == finfo_id