Comment # 1 on bug 909567 from Johannes Meixner

It seems the matching openSUSE forum thread is

https://forums.opensuse.org/showthread.php/502422-scangearmp2-for-Canon-Pixma-MG7550-does-not-work


Martin Gubser,
please provide the full text of your error report to Canon and
their full reply so that we know about Canon's reasoning why
they think the root cause is in libpthread.

With probability one (http://en.wikipedia.org/wiki/Almost_surely)
when there is a segfault in a glibc library function the root cause
is not in the library itself but at a higher level somewhere in the
application that calls library functions in a wrong way (usually by
calling a library function with an invalid pointer argumet - i.e.
the caller provides an invalid argumet and that causes the segfault).

Therefore we need to understand what debugging Canon did
that leads to their conclusion that the issue is not in
their scangearmp2 code but in libpthread.
Only Canon can debug their application to prove that the
issue is not in their application but in the library.