perldiag: Clarify memory wrap

diff --git a/pod/perldiag.pod b/pod/perldiag.pod
index 7c0d8d4..c785e95 100644 (file)
--- a/pod/perldiag.pod
+++ b/pod/perldiag.pod
@@ -3906,7 +3906,8 @@ references to an object.
 
 =item panic: memory wrap
 
-(P) Something tried to allocate more memory than possible.
+(P) Something tried to allocate either more memory than possible or a
+negative amount.
 
 =item panic: pad_alloc, %p!=%p