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-rw-r--r--pod/perldelta.pod5
1 files changed, 4 insertions, 1 deletions
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 346d917faf..2ef4f09a15 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -279,7 +279,10 @@ well.
=item *
-XXX
+It is now forbidden to malloc more than C<PTRDIFF_T_MAX> bytes. Much
+code (including C optimizers) assumes that all data structures will not
+be larger than this, so this catches such attempts before overflow
+happens.
=back