negativeContainerIndex
ftp://ftp.de.debian.org/debian/pool/main/k/kcontacts/kcontacts_5.116.0.orig.tar.xz
2.18.0 kcontacts-5.116.0/src/addressee.cpp:1504:31: warning: Either the condition 'rightOffset>=0' is redundant, otherwise there is negative array index -1. [negativeContainerIndex]