overlappingWriteFunction
ftp://ftp.de.debian.org/debian/pool/main/t/tachyon/tachyon_0.99~b6+dsx.orig.tar.xz
tachyon-0.99~b6+dsx.orig/demosrc/fire.c:170:3: error: Overlapping read/write in memcpy() is undefined behavior [overlappingWriteFunction]