[GLES] [nvidia] GLES branch crashes in PrivateVertexBuffer::render

Running precise with nvidia-current-updates (295.49):

Segmentation fault (core dumped)

(gdb) bt
#0 0x00007fffeab65e1e in ?? () from /usr/lib/nvidia-current-updates/libnvidia-glcore.so.295.49
#1 0x00007fffeac09da1 in ?? () from /usr/lib/nvidia-current-updates/libnvidia-glcore.so.295.49
#2 0x00007fffeae0ada1 in ?? () from /usr/lib/nvidia-current-updates/libnvidia-glcore.so.295.49
#3 0x00007fffeae081f3 in ?? () from /usr/lib/nvidia-current-updates/libnvidia-glcore.so.295.49
#4 0x00007ffff27215ea in PrivateVertexBuffer::render (this=<optimised out>, projection=<optimised out>, modelview=<optimised out>, attrib=0x738cc0)
    at /home/dan/bzr/compiz/gles2/plugins/opengl/src/vertexbuffer.cpp:499
#5 0x00007ffff2713630 in GLWindow::glDrawTexture (this=0x738bc0, texture=0x74bc00, transform=..., attrib=..., mask=<optimised out>) at /home/dan/bzr/compiz/gles2/plugins/opengl/src/paint.cpp:1169
#6 0x00007ffff2714178 in GLWindow::glDraw (this=0x738bc0, transform=..., attrib=..., region=..., mask=0) at /home/dan/bzr/compiz/gles2/plugins/opengl/src/paint.cpp:1228
#7 0x00007ffff27147db in PrivateGLScreen::paintOutputRegion (this=0x670cf0, transform=..., region=..., output=<optimised out>, mask=3) at /home/dan/bzr/compiz/gles2/plugins/opengl/src/paint.cpp:401
#8 0x00007ffff2714c90 in GLScreen::glPaintOutput (this=0x670520, sAttrib=..., transform=..., region=..., output=0x6324a0, mask=<optimised out>)
    at /home/dan/bzr/compiz/gles2/plugins/opengl/src/paint.cpp:531
#9 0x00007ffff271d07a in PrivateGLScreen::paintOutputs (this=0x670cf0, outputs=..., mask=4, region=...) at /home/dan/bzr/compiz/gles2/plugins/opengl/src/screen.cpp:1599
#10 0x00007ffff2d508b7 in CompositeScreen::handlePaintTimeout (this=0x664b30) at /home/dan/bzr/compiz/gles2/plugins/composite/src/screen.cpp:810
#11 0x00007ffff7ba040b in operator() (this=<optimised out>) at /usr/include/boost/function/function_template.hpp:1013
#12 CompTimer::triggerCallback (this=<optimised out>) at /home/dan/bzr/compiz/gles2/src/timer/src/timer.cpp:227
#13 0x00007ffff7ba050f in CompTimeoutSource::callback (this=<optimised out>) at /home/dan/bzr/compiz/gles2/src/timer/src/timer.cpp:150
#14 0x00007ffff7b9f9bd in operator() (this=<optimised out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#15 dispatch (slot=<optimised out>, this=<optimised out>) at /home/dan/bzr/compiz/gles2/src/timer/src/timer.cpp:133
#16 CompTimeoutSource::dispatch (this=<optimised out>, slot=<optimised out>) at /home/dan/bzr/compiz/gles2/src/timer/src/timer.cpp:131
#17 0x00007ffff6099f2f in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#18 0x00007ffff5ba1c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007ffff5ba2060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007ffff5ba245a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x0000000000402194 in main (argc=4, argv=0x7fffffffe5d8) at /home/dan/bzr/compiz/gles2/src/main.cpp:224