Backport r67759 (fix io.IncrementalNewlineDecoder for UTF-16 et al.).
diff --git a/Misc/NEWS b/Misc/NEWS
index ea5ee13..79d4493 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -74,6 +74,10 @@
Library
-------
+- Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
+ return encodes to more than one byte in the source encoding (e.g. UTF-16)
+ and gets split on a chunk boundary.
+
- Issue #4223: inspect.getsource() will now correctly display source code
for packages loaded via zipimport (or any other conformant PEP 302
loader). Original patch by Alexander Belopolsky.