Decompilation and Disassembly fail when function argument type is changed

[tedanvosin]

Description

Decompilation is cleared out when the argument type of a function is changed. Disassembly also becomes inaccessible.

Error:

ERROR    | 2025-12-16 16:10:05,591 | angr.analyses.analysis | Caught and logged AssertionError with resilience:
ERROR    | 2025-12-16 16:10:05,764 | angr.analyses.analysis | Caught and logged AssertionError with resilience:
Error calling Python override of QPlainTextEdit::event(): Traceback (most recent call last):
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qccode_edit.py", line 199, in event
    return super().event(event)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qccode_edit.py", line 267, in keyPressEvent
    mnu = self.get_context_menu()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qccode_edit.py", line 138, in get_context_menu
    under_cursor = self.node_under_cursor()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qccode_edit.py", line 124, in node_under_cursor
    current_node = doc.get_node_at_position(pos)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/documents/qcodedocument.py", line 54, in get_node_at_position
    if self._codegen is not None and self._codegen.map_pos_to_node is not None:
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/data/object_container.py", line 83, in __getattr__
    return getattr(self._am_obj, item)
AttributeError: Error calling Python override of QPlainTextEdit::keyPressEvent(): 'NoneType' object has no attribute 'map_pos_to_node'
Error calling Python override of QFrame::keyPressEvent(): Traceback (most recent call last):
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/views/disassembly_view.py", line 304, in keyPressEvent
    self.toggle_disasm_view()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/views/disassembly_view.py", line 623, in toggle_disasm_view
    self.display_linear_viewer(prefer)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/views/disassembly_view.py", line 653, in display_linear_viewer
    self._linear_viewer.show_instruction(next(iter(self.infodock.selected_insns)))
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 279, in show_instruction
    self.navigate_to_addr(insn_addr)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 291, in navigate_to_addr
    self.navigate_to(floor_region_offset + offset_into_region)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 295, in navigate_to
    self.prepare_objects(offset, start_line=0)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angr/utils/timing.py", line 72, in timed_func
    return func(*args, **kwargs)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 409, in prepare_objects
    is_cached, qobject = self._obj_to_paintable(obj_addr, obj)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 523, in _obj_to_paintable
    qobject = QLinearBlock(
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 436, in __init__
    super().__init__(*args, **kwargs)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 79, in __init__
    self._init_widgets()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 308, in _init_widgets
    self._init_disassembly_block_widgets()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 287, in _init_disassembly_block_widgets
    obj = QBlockCode(
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock_code.py", line 83, in __init__
    self.update_document()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock_code.py", line 96, in update_document
    self.obj.render_to_doc(cur)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/block_code_objects/base_objects.py", line 133, in render_to_doc
    obj.render_to_doc(cursor)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/block_code_objects/base_objects.py", line 133, in render_to_doc
    obj.render_to_doc(cursor)
AttributeError: 'NoneType' object has no attribute 'render_to_doc'
Error calling Python override of QGraphicsView::viewportEvent(): Traceback (most recent call last):
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qgraph.py", line 53, in viewportEvent
    return super().viewportEvent(event)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 52, in wheelEvent
    self.area.wheelEvent(event)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 173, in wheelEvent
    self.prepare_objects(self.offset, start_line=self._start_line_in_object - lines)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angr/utils/timing.py", line 72, in timed_func
    return func(*args, **kwargs)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 409, in prepare_objects
    is_cached, qobject = self._obj_to_paintable(obj_addr, obj)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qlinear_viewer.py", line 523, in _obj_to_paintable
    qobject = QLinearBlock(
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 436, in __init__
    super().__init__(*args, **kwargs)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 79, in __init__
    self._init_widgets()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 308, in _init_widgets
    self._init_disassembly_block_widgets()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock.py", line 287, in _init_disassembly_block_widgets
    obj = QBlockCode(
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock_code.py", line 83, in __init__
    self.update_document()
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/qblock_code.py", line 96, in update_document
    self.obj.render_to_doc(cur)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/block_code_objects/base_objects.py", line 133, in render_to_doc
    obj.render_to_doc(cursor)
  File "/Users/tedan/.pyenv/versions/3.10.18/lib/python3.10/site-packages/angrmanagement/ui/widgets/block_code_objects/base_objects.py", line 133, in render_to_doc
    obj.render_to_doc(cursor)
AttributeError: Error calling Python override of QGraphicsView::wheelEvent(): 'NoneType' object has no attribute 'render_to_doc'

file.zip

Steps to reproduce the bug

Load the binary and change the argument type of function _print_box from unsigned long long to char *.

Environment

No response

Additional context

No response

[ltfish]

I will fix the root cause in angr and add some resilience logic in angr management.

[ltfish]

Related: angr/angr#5948