invalidTestForOverflow
ftp://ftp.de.debian.org/debian/pool/main/p/pango1.0/pango1.0_1.56.3.orig.tar.xz
2.18.0 pango-1.56.3/pango/pango-layout.c:4190:11: warning: Invalid test for overflow '(width+extra_width)<(width)'; signed integer overflow is undefined behavior. Some mainstream compilers removes handling of overflows when optimising the code and change the code to 'extra_width<0'. [invalidTestForOverflow]