Crash occures when running xfreerdp into X11rdp session

A reproducable crash occures when using xfreerdp into X11rdp session, and running SQL Management studio application into a Win7 machine.
Pixman thorws: X11rdp: pixman-region.c:680: pixman_region_append_non_o: Assertion `r->x1 < r->x2' failed.

well that was a known bug in pixman lib , fixed in ver ~0.17 .