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[Bug 1407177] Re: segmentation fault in optirun subprocess causes crash of python

 

This seems to occur due to errornous referencing of wxPython components
in non-GUI threads. I never thought that this crashes the interpreter as
well, but that seems to comply with the specs, sorry.

** Changed in: python-defaults (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1407177

Title:
  segmentation fault in optirun subprocess causes crash of python

Status in python-defaults package in Ubuntu:
  Invalid

Bug description:
  Invoking `cudaminer` as argument to `optirun` as subprocess (using the
  `subprocess` module) can cause a segmentation fault. This segmentation
  fault crashes python as well. `dmesg` shows

      [18395.771643] bbswitch: enabling discrete graphics
      [18396.154074] [drm] Initialized nvidia-drm 0.0.0 20130102 for 0000:01:00.0 on minor 1
      [18396.154079] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  340.65  Tue Dec  2 09:50:34 PST 2014
      [18397.074544] vgaarb: this pci device is not a vga device
      [18397.074996] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18397.077359] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077430] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077475] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077525] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077567] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077607] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077664] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.077704] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18397.901647] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18398.278551] vgaarb: this pci device is not a vga device
      [18398.774341] nvidia_uvm: Loaded the UVM driver, major device number 249
      [18414.525505] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18414.527670] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527739] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527783] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527833] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527873] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527913] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.527968] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.528009] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18414.528673] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.688625] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18435.690862] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.690935] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691008] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691079] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691123] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691164] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691220] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.691261] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18435.692002] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.993550] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18456.995716] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.995787] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.995832] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.995882] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.995924] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.995965] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.996020] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.996061] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18456.996728] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.874471] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18477.876885] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.876958] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877004] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877055] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877096] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877137] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877193] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877234] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18477.877906] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.879720] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18498.881970] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882043] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882089] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882140] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882182] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882224] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882281] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.882339] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18498.883053] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.811461] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18519.814156] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814230] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814277] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814327] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814369] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814410] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814466] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.814507] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18519.815195] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.056186] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18540.058560] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058677] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058733] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058800] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058844] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058886] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058941] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.058982] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18540.059682] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.057735] nvidia 0000:01:00.0: irq 48 for MSI/MSI-X
      [18561.060506] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.060616] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.060688] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.060775] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.060847] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.060917] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.061012] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.061080] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18561.062096] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20130725/nsarguments-95)
      [18581.999614] python[25167]: segfault at 0 ip 00007f3f5ae2096c sp 00007f3f49972ff0 error 4 in libglib-2.0.so.0.4200.1[7f3f5adba000+10c000]

  The issue is not recognized by `apport` (although it should AFAIK). A
  `gdb` backtrace after `SIGSEGV` has been caught:

      Catchpoint 1 (signal SIGSEGV), 0x00007fffdf95921b in wxGrid::AutoSizeColOrRow (this=this@entry=0x16c4100, colOrRow=colOrRow@entry=2, setAsMin=setAsMin@entry=true, 
          direction=direction@entry=wxGRID_COLUMN) at ../src/generic/grid.cpp:8428
      8428	../src/generic/grid.cpp: No such file or directory.
      (gdb) backtrace
      #0  0x00007fffdf95921b in wxGrid::AutoSizeColOrRow (this=this@entry=0x16c4100, colOrRow=colOrRow@entry=2, setAsMin=setAsMin@entry=true, direction=direction@entry=wxGRID_COLUMN)
          at ../src/generic/grid.cpp:8428
      #1  0x00007fffdf95979c in AutoSizeColumn (setAsMin=true, col=2, this=0x16c4100) at ../include/wx/generic/grid.h:1446
      #2  wxGrid::SetOrCalcColumnSizes (this=this@entry=0x16c4100, calcOnly=calcOnly@entry=false, setAsMin=setAsMin@entry=true) at ../src/generic/grid.cpp:8607
      #3  0x00007fffdf959919 in wxGrid::AutoSize (this=0x16c4100) at ../src/generic/grid.cpp:8638
      #4  0x00007fffd5b991af in ?? () from /usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/_grid.x86_64-linux-gnu.so
      #5  0x00000000004ce3e3 in ext_do_call (nk=<optimized out>, na=<optimized out>, flags=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4331
      #6  PyEval_EvalFrameEx () at ../Python/ceval.c:2706
      #7  0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
      #8  0x00000000004cc4e4 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4117
      #9  call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4042
      #10 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
      #11 0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
      #12 0x00000000004cc4e4 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4117
      #13 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4042
      #14 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
      #15 0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
      #16 0x00000000004caf49 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4117
      #17 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4042
      #18 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
      #19 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimized out>, defcount=<optimized out>, defs=<optimized out>, kwcount=<optimized out>, kws=<optimized out>, 
          argcount=<optimized out>, args=<optimized out>, locals=<optimized out>, globals=<optimized out>, co=<optimized out>) at ../Python/ceval.c:3253
      #20 function_call.lto_priv () at ../Objects/funcobject.c:526
      #21 0x00000000004cd00f in PyObject_Call (kw=<optimized out>, arg=<optimized out>, func=<optimized out>) at ../Objects/abstract.c:2529
      #22 ext_do_call (nk=<optimized out>, na=<optimized out>, flags=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4334
      #23 PyEval_EvalFrameEx () at ../Python/ceval.c:2706
      #24 0x00000000004cb212 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4107
      #25 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4042
      #26 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
      #27 0x00000000004cb212 in fast_function (nk=<optimized out>, na=<optimized out>, n=<optimized out>, pp_stack=<optimized out>, func=<optimized out>) at ../Python/ceval.c:4107
      #28 call_function (oparg=<optimized out>, pp_stack=<optimized out>) at ../Python/ceval.c:4042
      #29 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
      #30 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimized out>, defcount=<optimized out>, defs=<optimized out>, kwcount=<optimized out>, kws=<optimized out>, 
          argcount=<optimized out>, args=<optimized out>, locals=<optimized out>, globals=<optimized out>, co=<optimized out>) at ../Python/ceval.c:3253
      #31 function_call.lto_priv () at ../Objects/funcobject.c:526
      #32 0x0000000000505128 in PyObject_Call (kw=<optimized out>, arg=<optimized out>, func=<optimized out>) at ../Objects/abstract.c:2529
      #33 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
      #34 0x00000000004d25fb in PyObject_Call (kw=<optimized out>, arg=(), func=<instancemethod at remote 0x7fffd5b38280>) at ../Objects/abstract.c:2529
      #35 PyEval_CallObjectWithKeywords () at ../Python/ceval.c:3890
      #36 0x00000000005bbc82 in t_bootstrap () at ../Modules/threadmodule.c:614
      #37 0x00007ffff7bc40a5 in start_thread (arg=0x7fffed49b700) at pthread_create.c:309
      #38 0x00007ffff78f177d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: python 2.7.8-1
  Uname: Linux 3.12.35-031235-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia openafs
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Jan  3 00:56:24 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-12-28 (5 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  SourcePackage: python-defaults
  UpgradeStatus: Upgraded to utopic on 2014-12-28 (5 days ago)

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References