https://bugs.freedesktop.org/show_bug.cgi?id=89034
--- Comment #12 from smoki smoki00790@gmail.com --- Those seems interesting:
err = 0x7f6cbf5538f0 <error: Cannot access memory at address 0x7f6cbf5538f0> buffer_data = 0x25 <error: Cannot access memory at address 0x25>