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[Chris Bainbridge <chris.bainbridge@xxxxxxxxx>]

** Bug watch added: freedesktop.org Bugzilla #77402
   https://bugs.freedesktop.org/show_bug.cgi?id=77402

** Also affects: mesa via
   https://bugs.freedesktop.org/show_bug.cgi?id=77402
   Importance: Unknown
       Status: Unknown

** Bug watch added: Debian Bug tracker #757435
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=757435

** Also affects: mesa (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=757435
   Importance: Unknown
       Status: Unknown

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https://bugs.launchpad.net/bugs/1289243

Title:
  Regression in trusty, i965_dri.so crashes

Status in Mesa:
  Unknown
Status in mesa package in Ubuntu:
  Fix Released
Status in mesa package in Debian:
  Unknown

Bug description:
  I am now getting crashes like

  (gdb) bt
  #0  0x00007fffe6d74958 in get_stencil_miptree (irb=0x7fffdd870080) at ../../../../../../../src/mesa/drivers/dri/i965/brw_misc_state.c:257
  #1  brw_workaround_depthstencil_alignment (brw=brw@entry=0x7fffdc027018, clear_mask=clear_mask@entry=0) at ../../../../../../../src/mesa/drivers/dri/i965/brw_misc_state.c:273
  #2  0x00007fffe6d3197d in brw_try_draw_prims (indirect=0x0, max_index=11, min_index=0, ib=0x7fffe621da80, nr_prims=1, prims=0x7fffe621daa0, arrays=0x7fffdc211030, ctx=0x7fffdc027018) at ../../../../../../../src/mesa/drivers/dri/i965/brw_draw.c:415
  #3  brw_draw_prims (ctx=0x7fffdc027018, prims=0x7fffe621daa0, nr_prims=1, ib=0x7fffe621da80, index_bounds_valid=<optimized out>, min_index=0, max_index=11, unused_tfb_object=0x0, indirect=0x0) at ../../../../../../../src/mesa/drivers/dri/i965/brw_draw.c:569
  #4  0x00007fffe6b8ec03 in vbo_handle_primitive_restart (ctx=ctx@entry=0x7fffdc027018, prim=prim@entry=0x7fffe621daa0, nr_prims=nr_prims@entry=1, ib=ib@entry=0x7fffe621da80, index_bounds_valid=index_bounds_valid@entry=0 '\000', min_index=min_index@entry=4294967295, 
      max_index=max_index@entry=4294967295) at ../../../../src/mesa/vbo/vbo_exec_array.c:585
  #5  0x00007fffe6b8ff20 in vbo_validated_drawrangeelements (ctx=ctx@entry=0x7fffdc027018, mode=mode@entry=5, index_bounds_valid=index_bounds_valid@entry=0 '\000', start=start@entry=4294967295, end=end@entry=4294967295, count=count@entry=14, type=type@entry=5123, 
      indices=indices@entry=0x7fffdc0c6bc0, basevertex=basevertex@entry=0, numInstances=numInstances@entry=1, baseInstance=baseInstance@entry=0) at ../../../../src/mesa/vbo/vbo_exec_array.c:1006
  #6  0x00007fffe6b90443 in vbo_exec_DrawElements (mode=5, count=14, type=5123, indices=0x7fffdc0c6bc0) at ../../../../src/mesa/vbo/vbo_exec_array.c:1156
  #7  0x00007ffff6744e0c in QSGDefaultRenderer::renderNodes (this=this@entry=0x7fffdc1cc670, nodes=<optimized out>, count=count@entry=40) at scenegraph/coreapi/qsgdefaultrenderer.cpp:536
  #8  0x00007ffff674554c in QSGDefaultRenderer::render (this=0x7fffdc1cc670) at scenegraph/coreapi/qsgdefaultrenderer.cpp:281
  #9  0x00007ffff674acc8 in QSGRenderer::renderScene (this=this@entry=0x7fffdc1cc670, bindable=...) at scenegraph/coreapi/qsgrenderer.cpp:271
  #10 0x00007ffff674adf7 in QSGRenderer::renderScene (this=this@entry=0x7fffdc1cc670) at scenegraph/coreapi/qsgrenderer.cpp:229
  #11 0x00007ffff6754365 in QSGContext::renderNextFrame (this=<optimized out>, renderer=0x7fffdc1cc670, fboId=<optimized out>) at scenegraph/qsgcontext.cpp:270
  #12 0x00007ffff678139a in QQuickWindowPrivate::renderSceneGraph (this=this@entry=0x662c10, size=...) at items/qquickwindow.cpp:349
  #13 0x00007ffff6863483 in QQuickRenderThreadSingleContextWindowManager::run (this=0x6634f0) at items/qquickthreadedwindowmanager.cpp:456
  #14 0x00007ffff7629186 in QThreadPrivate::start (arg=0x6634f0) at thread/qthread_unix.cpp:333
  #15 0x00007ffff5842182 in start_thread (arg=0x7fffe621e700) at pthread_create.c:312
  #16 0x00007ffff5b5312d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

  When running some of the tests of unity8 where a few days ago it was
  fine.

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