test_ifd_loop_detection: fix Coverity Scan issue CID 1520750: Null pointer...
test_ifd_loop_detection: fix Coverity Scan issue CID 1520750: Null pointer dereferences (NULL_RETURNS) line 55.
test_ifd_loop_detection: fix Coverity Scan issue CID 1520750: Null pointer dereferences (NULL_RETURNS) line 55.