Segmentation fault with qpa directfb when upgrade qt5.2

The qt5.0.2 can work well with qpa directfb. Recently, I upgrade qt to 5.2.0 version and I find qpa directfb can't work. directfb version is 1.6.0.3
gdb info:
Program received signal SIGSEGV, Segmentation fault.
[Switching to LWP 1590]
0xb6079ecc in QThreadPrivate::start(void*) () from /usr/lib/libQt5Core.so.5
(gdb) backtrace
#0 0xb6079ecc in QThreadPrivate::start(void*) ()
from /usr/lib/libQt5Core.so.5
#1 0xb5f55ed2 in start_thread () from /lib/libpthread.so.0
#2 0xb5dc9058 in ?? () from /lib/libc.so.6
#3 0xb5dc9058 in ?? () from /lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

By the way, I also want to ask whether or not you support qpa directfb?
Thank you.