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pallets · Aug 8, 2023 · f8d8006 · f8d8006
1 parent e95784a
commit f8d8006
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diff --git a/CHANGES.rst b/CHANGES.rst
@@ -8,6 +8,7 @@ Unreleased
 -   Use modern packaging metadata with ``pyproject.toml`` instead of ``setup.cfg``.
     :pr:`326`
 -   Use ``flit_core`` instead of ``setuptools`` as build backend.
+-   Fix bug in regex substitution in shell completion. :issue:`2581`
 
 
 Version 8.1.4

diff --git a/src/click/shell_completion.py b/src/click/shell_completion.py
@@ -230,7 +230,7 @@ def func_name(self) -> str:
         """The name of the shell function defined by the completion
         script.
         """
-        safe_name = re.sub(r"\W*", "", self.prog_name.replace("-", "_"), flagsre.ASCII)
+        safe_name = re.sub(r"\W*", "", self.prog_name.replace("-", "_"), flags=re.ASCII)
         return f"_{safe_name}_completion"
 
     def source_vars(self) -> t.Dict[str, t.Any]: