[astroid-error] error when checking type comment like 'type: # comment'

[Ultimanecat]

Bug description

Checking the following code would lead to an astroid-error:

a = 1 # type: # any comment

This is probably due to a bug in astroid.
In astroid.rebuilder: check_type_comment, when the type comment is parsed as an ast, comment results in a 0-sized body, which leads to an IndexError.

Configuration

No response

Command used

pylint test_crash.py

Pylint output

Traceback (most recent call last):
  File "d:\codecheck-python\codecheck-pylint13\pylint\lint\pylinter.py", line 1279, in get_ast
    return MANAGER.ast_from_file(filepath, modname, source=True)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\manager.py", line 102, in ast_from_file
    return AstroidBuilder(self).file_build(filepath, modname)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\builder.py", line 133, in file_build
    module, builder = self._data_build(data, modname, path)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\builder.py", line 191, in _data_build
    module = builder.visit_module(node, modname, node_file, package)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\rebuilder.py", line 279, in visit_module
    [self.visit(child, newnode) for child in node.body],
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\rebuilder.py", line 279, in <listcomp>
    [self.visit(child, newnode) for child in node.body],
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\rebuilder.py", line 624, in visit
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\rebuilder.py", line 825, in visit_assign
    type_annotation = self.check_type_comment(node, parent=newnode)
  File "C:\Users\xxx\AppData\Local\Programs\Python\Python38\lib\site-packages\astroid-2.11.5-py3.8.egg\astroid\rebuilder.py", line 761, in check_type_comment
    type_object = self.visit(type_comment_ast.body[0], parent=parent)
IndexError: list index out of range
************* Module test_crash
C:\Users\xxx\Desktop\test_crash.py:1:0: F0002: C:\Users\xxx\Desktop\test_crash.py: Fatal error while checking 'C:\Users\xxx\Desktop\test_crash.py'. Please open an issue in our bug tracker so we address this. There is a pre-filled template that you can use in 'C:\Users\xxx\AppData\Local\pylint\pylint\Cache\pylint-crash-2022-08-24-10.txt'. (astroid-error)

Expected behavior

no crash, no error

Pylint version

pylint 2.13.9
astroid 2.11.5
Python 3.8.8 (tags/v3.8.8:024d805, Feb 19 2021, 13:18:16) [MSC v.1928 64 bit (AMD64)]

OS / Environment

No response

Additional dependencies

No response

[mbyrnepr2]

Thanks @Ultimanecat.

Also reproducible on:

pylint 2.15.0-a0
astroid 2.13.0-dev0

[DanielNoord]

Fixed with pylint-dev/astroid#1753.

@Pierre-Sassoulas Since this is a crash should we consider releasing another quick patch version of astroid to include this fix in the new pylint version?

[Pierre-Sassoulas]

Astroid 2.12.4 was released with the fix 🎉

[DanielNoord]

Thanks for releasing @Pierre-Sassoulas 😄