Merge: #12839: Fix crash in zlib module due to version mismatch.
If the version of zlib used to compile the zlib module is incompatible
with the one that is actually linked in, then calls into zlib will fail.
This can leave attributes of the z_stream uninitialized, so we must take
care to avoid segfaulting by trying to use an invalid pointer.
Fix by Richard M. Tew.
diff --git a/Misc/NEWS b/Misc/NEWS
index 85dbe25..b852219 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -268,6 +268,9 @@
Library
-------
+- Issue #12839: Fix crash in zlib module due to version mismatch.
+ Fix by Richard M. Tew.
+
- Issue #9923: The mailcap module now correctly uses the platform path
separator for the MAILCAP environment variable on non-POSIX platforms.