IOWithoutPositioning
ftp://ftp.de.debian.org/debian/pool/main/g/gcin/gcin_2.9.4+dfsg1.orig.tar.xz
gcin-2.9.4/tsin-util.cpp:422:5: error: Read and write operations without a call to a positioning function (fseek, fsetpos or rewind) or fflush in between result in undefined behaviour. [IOWithoutPositioning]