From: Brian Wellington <bwelling@xbill.org>
Date: Wed, 5 Jun 2024 22:49:28 +0000 (-0700)
Subject: More error checking in feature detection (#1088)
X-Git-Tag: v2.7.0rc1~47
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=369a846766fd50017d8fb28da930b83782da881c;p=thirdparty%2Fdnspython.git

More error checking in feature detection (#1088)

importlib.metadata.version() can return None in some cases, even though
it's not documented as doing so.  Treat that as an error.
---

diff --git a/dns/_features.py b/dns/_features.py
index e5137cbc..e92beb94 100644
--- a/dns/_features.py
+++ b/dns/_features.py
@@ -32,6 +32,9 @@ def _version_check(
     package, minimum = requirement.split(">=")
     try:
         version = importlib.metadata.version(package)
+        # This shouldn't happen, but it apparently can.
+        if version is None:
+            return False
     except Exception:
         return False
     t_version = _tuple_from_text(version)