IndexError when _alias() has no arguments

[correctmost]

Bug description

_alias()

This bug was discovered by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=57984 (report not public yet)

Configuration

N/A

Command used

pylint a.py

Pylint output

Stacktrace

Traceback (most recent call last):
  File "/home/s/code/pylint/pylint/lint/pylinter.py", line 974, in get_ast
    return MANAGER.ast_from_file(filepath, modname, source=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/manager.py", line 167, in ast_from_file
    return AstroidBuilder(self).file_build(filepath, modname)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/builder.py", line 145, in file_build
    return self._post_build(module, builder, encoding)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/builder.py", line 173, in _post_build
    module = self._manager.visit_transforms(module)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/manager.py", line 128, in visit_transforms
    return self._transform.visit(node)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 162, in visit
    return self._visit(node)
           ^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 84, in _visit
    visited = self._visit_generic(value)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 112, in _visit_generic
    return [self._visit_generic(child) for child in node]
            ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 119, in _visit_generic
    return self._visit(node)
           ^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 84, in _visit
    visited = self._visit_generic(value)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 119, in _visit_generic
    return self._visit(node)
           ^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 87, in _visit
    return self._transform(node)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/transforms.py", line 66, in _transform
    if predicate is None or predicate(node):
                            ^^^^^^^^^^^^^^^
  File "/home/s/code/astroid/astroid/brain/brain_typing.py", line 262, in _looks_like_typing_alias
    isinstance(node.args[0], (Attribute, Name))
               ~~~~~~~~~^^^
IndexError: list index out of range

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/s/code/pylint/pylint/lint/pylinter.py", line 714, in _get_asts
    ast_per_fileitem[fileitem] = self.get_ast(
                                 ^^^^^^^^^^^^^
  File "/home/s/code/pylint/pylint/lint/pylinter.py", line 996, in get_ast
    raise astroid.AstroidBuildingError(
astroid.exceptions.AstroidBuildingError: Building error when trying to create ast representation of module 'input'

Expected behavior

No crash

Pylint version

pylint 6bb335f5ca2c52a994d5836eee63dc2c140fc5f3
f924ba2

OS / Environment

Arch Linux

Additional dependencies

No response

[correctmost]

OSS-Fuzz discovered another IndexError when there's only one argument to _alias (OSS-Fuzz bug report):

a = _alias(int)

Traceback (most recent call last):
  File "pylint/pylint/checkers/utils.py", line 1365, in safe_infer
    value = next(infer_gen)
            ^^^^^^^^^^^^^^^
  File "astroid/astroid/nodes/node_ng.py", line 147, in infer
    for result in self._explicit_inference(
                  ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "astroid/astroid/inference_tip.py", line 70, in inner
    raise e from None
  File "astroid/astroid/inference_tip.py", line 66, in inner
    func(node, context, **kwargs)
  File "astroid/astroid/brain/brain_typing.py", line 330, in infer_typing_alias
    maybe_type_var = node.args[1]
                     ~~~~~~~~~^^^
IndexError: list index out of range

It seems like a comprehensive fix can handle both crashes. If not, I will file this issue separately.