I am trying to debug ctfmerge issues (it sometimes crashes or enters an infinite loop), and had occasion to kill it during testing; I just did `killall ctfmerge` When I do this, it prints: ERROR: ctfmerge: Caught signal 15 - exiting and then exits with 0. It seems a nonzero return would be more appropriate.
Hrmph, it seems this was done intentionally. I believe it is now time to undo it -- https://reviews.freebsd.org/D43743