shiftNegativeLHS
ftp://ftp.de.debian.org/debian/pool/main/s/skiboot/skiboot_7.0+dfsg.orig.tar.xz
head skiboot-7.0+dfsg/libpore/p10_stop_api.C:1501:54: portability: Shifting a negative value is technically undefined behaviour [shiftNegativeLHS]
head skiboot-7.0+dfsg/libpore/p9_stop_api.C:1445:54: portability: Shifting a negative value is technically undefined behaviour [shiftNegativeLHS]
ftp://ftp.de.debian.org/debian/pool/main/s/sox/sox_14.4.2+git20190427.orig.tar.bz2
head sox-14.4.2/src/silence.c:280:43: portability: Shifting a negative value is technically undefined behaviour [shiftNegativeLHS]
ftp://ftp.de.debian.org/debian/pool/main/s/stimfit/stimfit_0.16.11.orig.tar.gz
head stimfit-0.16.11/src/libstfio/intan/common.h:70:18: portability: Shifting a negative value is technically undefined behaviour [shiftNegativeLHS]