If find is set to search for files (-type f) while following symbolic links
(-L) and a symbolic link loop exists, then it still prints the looping links
while an error message is expected. If a symbolic link loop exists, no stat
information is available and the flag FTS_NS is set (ftsfind.c:586). The flag
is not properly handled (ftsfind.c:431-446) so that the links are printed
(pred.c:1459).

Example of Correct Fix: 
Handle FTS_NS as error IF symlink loop.

Examples of Incorrect Fixes:
1) Handle FTS_NS as error independent of whether it is a symlink loop
(Regression because FTS_NS alone does not indicate an error). 

2) Handle all flags as error (Regression because not all flags indicate
errors).