shiftNegative
ftp://ftp.de.debian.org/debian/pool/main/v/vdr-plugin-live/vdr-plugin-live_3.5.2.orig.tar.gz
vdr-plugin-live-3.5.2/xxhash.h:4450:23: error: Shifting by a negative value is undefined behaviour [shiftNegative]
ftp://ftp.de.debian.org/debian/pool/main/v/virglrenderer/virglrenderer_1.2.0.orig.tar.bz2
virglrenderer-1.2.0/src/vrend/vrend_shader.c:2507:26: error: Shifting by a negative value is undefined behaviour [shiftNegative]
virglrenderer-1.2.0/src/vrend/vrend_shader.c:2526:26: error: Shifting by a negative value is undefined behaviour [shiftNegative]