warn() without args doesn't take a default message in $_, but in $@

p4raw-id: //depot/perl@30554

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 1b01b6b..b80331d 100644 (file)
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -4883,7 +4883,7 @@ minimum version.
 =item Warning: something's wrong
 
 (W) You passed warn() an empty string (the equivalent of C<warn "">) or
-you called it with no args and C<$_> was empty.
+you called it with no args and C<$@> was empty.
 
 =item Warning: unable to close filehandle %s properly