AssertionError when root is not a module

[correctmost]

Description

The following code triggers an AssertionError in astroid:

a=eval.__get__(1).__gt__

@a
class c: ...

This bug was discovered by OSS-Fuzz:
https://issues.oss-fuzz.com/issues/389974978 (report not public yet)

Backtrace

Traceback (most recent call last):
  File "pylint/pylint/lint/pylinter.py", line 979, in get_ast
    return MANAGER.ast_from_file(filepath, modname, source=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/manager.py", line 167, in ast_from_file
    return AstroidBuilder(self).file_build(filepath, modname)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/builder.py", line 145, in file_build
    return self._post_build(module, builder, encoding)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/builder.py", line 173, in _post_build
    module = self._manager.visit_transforms(module)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/manager.py", line 128, in visit_transforms
    return self._transform.visit(node)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 162, in visit
    return self._visit(node)
           ^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 84, in _visit
    visited = self._visit_generic(value)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 112, in _visit_generic
    return [self._visit_generic(child) for child in node]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 112, in <listcomp>
    return [self._visit_generic(child) for child in node]
            ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 119, in _visit_generic
    return self._visit(node)
           ^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 87, in _visit
    return self._transform(node)
           ^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/transforms.py", line 66, in _transform
    if predicate is None or predicate(node):
                            ^^^^^^^^^^^^^^^
  File "astroid/astroid/brain/brain_attrs.py", line 59, in is_decorated_with_attrs
    if inferred and inferred.root().name == "attr._next_gen":
                    ^^^^^^^^^^^^^^^
  File "astroid/astroid/nodes/node_ng.py", line 334, in root
    assert isinstance(self, nodes.Module)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError

Similar issues

• AssertionError where root is a const, not a module #2618

Version

• 8527f5b