New-file causes Python assert with negative reference count #94708

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opened 2022-01-07 07:41:16 +01:00 by Campbell Barton · 4 comments

When Blender is built against a debug Python library the following steps cause a negative reference count and asserts.

This can be redone with the following steps:

  • Run Blender with factory settings.
  • Press W once (to set the circle select tool).
  • Ctrl-N, Enter (to make a new file).

Blender exits with the following error.

source/blender/python/intern/bpy_rna_callback.c:267: _Py_NegativeRefcount: Assertion failed: object has negative ref count
Enable tracemalloc to get the memory block allocation traceback

object address  : 0x7fda4ad5dcc0
object refcount : -1
object type     : 0x55a5d0f754a0
object type name: tuple
object repr     : <refcnt -1 at 0x7fda4ad5dcc0>

Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailed
Python runtime state: initialized

Current thread 0x00007fda712548c0 (most recent call first):
  File "/src/cmake_debug/bin/3.1/scripts/startup/bl_ui/space_toolsystem_common.py", line 1073 in _activate_by_item
  File "/src/cmake_debug/bin/3.1/scripts/startup/bl_ui/space_toolsystem_common.py", line 1091 in activate_by_id
  File "/src/cmake_debug/bin/3.1/scripts/startup/bl_operators/wm.py", line 2119 in execute

Extension modules: bpy.props, bpy.app.icons, bpy.app.timers, bpy.utils.units, bpy.types, mathutils.geometry, mathutils.interpolate, mathutils.noise, mathutils, idprop, gpu.capabilities, gpu.matrix, gpu.platform, gpu.select, gpu.shader, gpu.state, gpu.texture (total: 17)

Reporting this for reference.

When Blender is built against a debug Python library the following steps cause a negative reference count and asserts. This can be redone with the following steps: - Run Blender with factory settings. - Press W once (to set the circle select tool). - Ctrl-N, Enter (to make a new file). Blender exits with the following error. ``` source/blender/python/intern/bpy_rna_callback.c:267: _Py_NegativeRefcount: Assertion failed: object has negative ref count Enable tracemalloc to get the memory block allocation traceback object address : 0x7fda4ad5dcc0 object refcount : -1 object type : 0x55a5d0f754a0 object type name: tuple object repr : <refcnt -1 at 0x7fda4ad5dcc0> Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailed Python runtime state: initialized Current thread 0x00007fda712548c0 (most recent call first): File "/src/cmake_debug/bin/3.1/scripts/startup/bl_ui/space_toolsystem_common.py", line 1073 in _activate_by_item File "/src/cmake_debug/bin/3.1/scripts/startup/bl_ui/space_toolsystem_common.py", line 1091 in activate_by_id File "/src/cmake_debug/bin/3.1/scripts/startup/bl_operators/wm.py", line 2119 in execute Extension modules: bpy.props, bpy.app.icons, bpy.app.timers, bpy.utils.units, bpy.types, mathutils.geometry, mathutils.interpolate, mathutils.noise, mathutils, idprop, gpu.capabilities, gpu.matrix, gpu.platform, gpu.select, gpu.shader, gpu.state, gpu.texture (total: 17) ``` --- Reporting this for reference.
Campbell Barton self-assigned this 2022-01-07 07:41:16 +01:00
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Added subscriber: @ideasman42

Added subscriber: @ideasman42

This issue was referenced by 3b686b8233

This issue was referenced by 3b686b823353e02a4c0b8dbfcbe176caaec2438d

This issue was referenced by f24854005d

This issue was referenced by f24854005d8688fb86cf41bd62a63580c63f818d
Author
Owner

Changed status from 'Needs Triage' to: 'Resolved'

Changed status from 'Needs Triage' to: 'Resolved'
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Reference: blender/blender#94708
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