perldelta for readline ignores EAGAIN, EWOULDBLOCK

Author: tonycoz

pod/perldelta.pod

@@ -401,6 +401,13 @@ C<FETCH>, but without using the result. If VAR is a reference, the referenced
 entity has its refcount properly decremented when VAR is turned into a string;
 previously, it would leak memory. [GH #22898]
 
+=item *
+
+L<perlfunc/readline> now clears the error flag if an error occurs when
+reading and that error is C<EAGAIN> or C<EWOULDBLOCK>.  This allows
+old code that depended on C<readline> to clear all errors to ignore
+these relatively harmless errors.  [GH #22883]
+
 =back
 
 =head1 Known Problems