From 818f48f52f07e2362812929819c293498a779f40 Mon Sep 17 00:00:00 2001
From: Zefram <zefram@fysh.org>
Date: Thu, 22 Mar 2018 21:20:20 +0000
Subject: perldelta 397baf232086e0a9ad6f881a9614d3dbaea853fc

(cherry picked from commit 9a40fcb68413c7a6091696885a6f6b34ec8bdf97)
---
 pod/perldelta.pod | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index a6c64367f0..5340a1795d 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -340,6 +340,12 @@ files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
 
 XXX
 
+=item *
+
+The C<readpipe()> built-in function now checks at compile time that
+it has only one parameter expression, and puts it in scalar context,
+thus ensuring that it doesn't corrupt the stack at runtime.  [perl #4574]
+
 =back
 
 =head1 Known Problems
-- 
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