Add regression test for #5770

ChangeLog

@@ -120,6 +120,11 @@ Release date: TBA
 
   Closes #5731
 
+* Fixed a crash involving a ``NewType`` named with an f-string.
+
+  Closes #5770
+  Ref PyCQA/astroid#1400
+
 * Improved ``bad-open-mode`` message when providing ``None`` to the ``mode``
   argument of an ``open()`` call.
 

doc/whatsnew/2.13.rst

@@ -247,6 +247,11 @@ Other Changes
 
   Closes #5731
 
+* Fixed a crash involving a ``NewType`` named with an f-string.
+
+  Closes #5770
+  Ref PyCQA/astroid#1400
+
 * Improved ``bad-open-mode`` message when providing ``None`` to the ``mode``
   argument of an ``open()`` call.
 

tests/functional/ext/redefined_variable_type/regression_newtype_fstring.py

@@ -0,0 +1,9 @@
+"""Regression test for issue 5770: NewType created with f-string
+See: https://github.com/PyCQA/pylint/issues/5770
+"""
+from typing import NewType
+
+def make_new_type(suffix):
+    """Dynamically create a NewType with `suffix`"""
+    new_type = NewType(f'IntRange_{suffix}', suffix)
+    print(new_type)

tests/functional/ext/redefined_variable_type/regression_newtype_fstring.rc

@@ -0,0 +1,2 @@
+[MASTER]
+load-plugins=pylint.extensions.redefined_variable_type,