[fix] Crash when parsing an empty arbitrary expression with extract_node (#2736)

Closes #2734

Author: Pierre-Sassoulas

ChangeLog

@@ -37,7 +37,9 @@ What's New in astroid 3.3.11?
 =============================
 Release date: TBA
 
+* Fix a crash when parsing an empty arbitrary expression with ``extract_node`` (``extract_node("__()")``).
 
+  Closes #2734
 
 What's New in astroid 3.3.10?
 =============================

astroid/builder.py

@@ -317,6 +317,7 @@ def _extract_expressions(node: nodes.NodeNG) -> Iterator[nodes.NodeNG]:
         isinstance(node, nodes.Call)
         and isinstance(node.func, nodes.Name)
         and node.func.name == _TRANSIENT_FUNCTION
+        and node.args
     ):
         real_expr = node.args[0]
         assert node.parent

tests/test_regrtest.py

@@ -498,3 +498,9 @@ def _get_option(self, option):
         )
     )
     assert node.inferred()[0].value == "mystr"
+
+
+def test_regression_no_crash_during_build() -> None:
+    node: nodes.Attribute = extract_node("__()")
+    assert node.args == []
+    assert node.as_string() == "__()"