bpo-42249: Fix writing binary Plist files larger than 4 GiB. (GH-23121)

diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index 83b214e9dc49bfbfc854f3be6313351f0e4c9ace..2eeebe4c9a4244bc30dd411fa6f428afd37cc5e7 100644 (file)
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -611,7 +611,7 @@ def _count_to_size(count):
     elif count < 1 << 16:
         return 2
 
-    elif count << 1 << 32:
+    elif count < 1 << 32:
         return 4
 
     else:

diff --git a/Misc/NEWS.d/next/Library/2020-11-03-09-22-56.bpo-42249.vfNO2u.rst b/Misc/NEWS.d/next/Library/2020-11-03-09-22-56.bpo-42249.vfNO2u.rst
new file mode 100644 (file)
index 0000000..071a0fd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-11-03-09-22-56.bpo-42249.vfNO2u.rst
@@ -0,0 +1 @@
+Fixed writing binary Plist files larger than 4 GiB.