X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/5e2bb528e09df368ed7dea6b7fb9c53e799a569f..1c6b3a3a6fbc50b651d4ac34247903041d3f6329:/src/black/__init__.py

diff --git a/src/black/__init__.py b/src/black/__init__.py
index 1923c06..e2376c4 100644
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -177,8 +177,8 @@ def validate_regex(
 ) -> Optional[Pattern[str]]:
     try:
         return re_compile_maybe_verbose(value) if value is not None else None
-    except re.error:
-        raise click.BadParameter("Not a valid regular expression") from None
+    except re.error as e:
+        raise click.BadParameter(f"Not a valid regular expression: {e}") from None
 
 
 @click.command(