#0  rtHeapSimpleAllocBlock (pHeapInt=0x7f3b8f26b000, cb=64, uAlignment=32) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:498
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp was not found in source tree]
#1  0x00007f3b900d3dfc in RTHeapSimpleAlloc (hHeap=<optimized out>, cb=<optimized out>, cbAlignment=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:415
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp was not found in source tree]
#2  0x00007f3b900d361e in HGSMIHeapBufferAlloc (pHeap=pHeap@entry=0x7f3b96925ee2, cbBuffer=cbBuffer@entry=56) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:340
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp was not found in source tree]
#3  0x00007f3b900d366b in HGSMIHeapAlloc (pHeap=0x7f3b96925ee2, cbData=32, u8Channel=<optimized out>, u16ChannelInfo=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:305
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp was not found in source tree]
#4  0x00007f3b900d2b7f in VBoxHGSMIProcessDisplayInfo (pCtx=0x7f3b96925ee2, cDisplay=0, cOriginX=0, cOriginY=0, offStart=0, cbPitch=4096, cWidth=1024, cHeight=768, cBPP=0, fFlags=1) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp:257
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp was not found in source tree]
#5  0x00007f3b900d0322 in VBOXSetMode (pScrn=0x7f3b96925810, cDisplay=<optimized out>, cWidth=<optimized out>, cHeight=768, x=0, y=0) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/setmode.c:132
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/setmode.c was not found in source tree]
#6  0x00007f3b900d07c3 in vbox_output_dpms (output=<optimized out>, mode=mode@entry=3) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/vboxvideo.c:419
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/vboxvideo.c was not found in source tree]
#7  0x00007f3b900d0a47 in VBOXLeaveVT (pScrn=0x7f3b96925810) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/vboxvideo.c:1229
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/vboxvideo.c was not found in source tree]
#8  0x00007f3b95d382d5 in AbortDDX (error=error@entry=EXIT_ERR_ABORT) at ../../../../hw/xfree86/common/xf86Init.c:1148
  [Error: ../../../../hw/xfree86/common/xf86Init.c was not found in source tree]
#9  0x00007f3b95e5e712 in AbortServer () at ../../os/log.c:784
  [Error: ../../os/log.c was not found in source tree]
#10 0x00007f3b95e5f51d in FatalError (f=f@entry=0x7f3b95e8af30 "Caught signal %d (%s). Server aborting\n") at ../../os/log.c:925
  [Error: ../../os/log.c was not found in source tree]
#11 0x00007f3b95e5679c in OsSigHandler (signo=11, sip=<optimized out>, unused=<optimized out>) at ../../os/osinit.c:147
  [Error: ../../os/osinit.c was not found in source tree]
#12 <signal handler called>
#13 rtHeapSimpleAllocBlock (pHeapInt=0x7f3b8f26b000, cb=64, uAlignment=32) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:498
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp was not found in source tree]
#14 0x00007f3b900d3dfc in RTHeapSimpleAlloc (hHeap=<optimized out>, cb=<optimized out>, cbAlignment=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp:415
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Runtime/common/alloc/heapsimple.cpp was not found in source tree]
#15 0x00007f3b900d361e in HGSMIHeapBufferAlloc (pHeap=pHeap@entry=0x7f3b96925ee2, cbBuffer=cbBuffer@entry=56) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:340
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp was not found in source tree]
#16 0x00007f3b900d366b in HGSMIHeapAlloc (pHeap=0x7f3b96925ee2, cbData=32, u8Channel=<optimized out>, u16ChannelInfo=<optimized out>) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp:305
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/GuestHost/HGSMI/HGSMICommon.cpp was not found in source tree]
#17 0x00007f3b900d2b7f in VBoxHGSMIProcessDisplayInfo (pCtx=0x7f3b96925ee2, cDisplay=0, cOriginX=0, cOriginY=0, offStart=0, cbPitch=4096, cWidth=1024, cHeight=768, cBPP=32, fFlags=1) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp:257
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/common/VBoxVideo/Modesetting.cpp was not found in source tree]
#18 0x00007f3b900d0322 in VBOXSetMode (pScrn=0x7f3b96925810, cDisplay=<optimized out>, cWidth=<optimized out>, cHeight=768, x=0, y=0) at /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/setmode.c:132
  [Error: /build/buildd/virtualbox-4.3.26-dfsg/src/VBox/Additions/x11/vboxvideo/setmode.c was not found in source tree]
#19 0x00007f3b95d6c6e7 in xf86DPMSSet (scrn=<optimized out>, mode=0, flags=<optimized out>) at ../../../../hw/xfree86/modes/xf86Crtc.c:2940
  [Error: ../../../../hw/xfree86/modes/xf86Crtc.c was not found in source tree]
#20 0x00007f3b95d35306 in DPMSClose (pScreen=0x7f3b96926040) at ../../../../hw/xfree86/common/xf86DPMS.c:126
  [Error: ../../../../hw/xfree86/common/xf86DPMS.c was not found in source tree]
#21 0x00007f3b95d88258 in CursorCloseScreen (pScreen=0x7f3b96926040) at ../../xfixes/cursor.c:187
  [Error: ../../xfixes/cursor.c was not found in source tree]
#22 0x00007f3b95dd3a04 in AnimCurCloseScreen (pScreen=<optimized out>) at ../../render/animcur.c:106
  [Error: ../../render/animcur.c was not found in source tree]
#23 0x00007f3b95dd5372 in present_close_screen (screen=0x7f3b96926040) at ../../present/present_screen.c:64
  [Error: ../../present/present_screen.c was not found in source tree]
#24 0x00007f3b95cfb3a7 in dix_main (argc=10, argv=0x7ffd8baf0608, envp=<optimized out>) at ../../dix/main.c:351
  [Error: ../../dix/main.c was not found in source tree]
#25 0x00007f3b93986a40 in __libc_start_main (main=0x7f3b95ce5600 <main>, argc=10, argv=0x7ffd8baf0608, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd8baf05f8) at libc-start.c:289
  [Error: libc-start.c was not found in source tree]
#26 0x00007f3b95ce562e in _start ()