pylint #9392 crash on a module written in C [resolved]

pylint crashes on a module written in C :

$ pylint checkpoint.so
No config file found, using default configuration
Traceback (most recent call last):
File "/usr/bin/pylint", line 4, in <module>
lint.Run(sys.argv[1:])
File "src/pylint/lint.py", line 881, in __init__
linter.check(args)
File "src/pylint/lint.py", line 500, in check
self.check_astng_module(astng, checkers)
File "src/pylint/lint.py", line 577, in check_astng_module
if implements(checker, IASTNGChecker)])
File "src/pylint/lint.py", line 594, in astng_events
self.astng_events(child, checkers, _reversed_checkers)
File "src/pylint/lint.py", line 591, in astng_events
checker.visit(astng)
File "/src/logilab/astng/utils.py", line 320, in visit
method(node)
File "src/pylint/checkers/format.py", line 269, in visit_default
assert line, node
AssertionError: ClassDef(CheckPoint)