Comment 2 for bug 987549

Works with 1354.
'no output' with 1355.

Manually reverting this hunk when using 1355 makes it "work" again...

<pre>
--- lisp/vm-save.el 2012-02-05 17:09:18 +0000
+++ lisp/vm-save.el 2012-02-12 20:29:09 +0000
@@ -645,7 +645,7 @@
        (pop-up-windows (and pop-up-windows (eq vm-mutable-window-configuration t)))
        ;; prefix arg doesn't have "normal" meaning here, so only call
        ;; vm-select-operable-messages for marks and threads.
- (mlist (vm-select-operable-messages 1 (vm-interactive-p) "Pipe")))
+ (mlist (vm-select-operable-messages 0 (vm-interactive-p) "Pipe")))
     (vm-retrieve-operable-messages 1 mlist)
     (save-excursion
       (set-buffer buffer)
</pre>

All the versions I've tried over the years have been happy to pipe the current message to a command. Since that's a sparse mapping, it may be that some other versions produced 'no output' but none that I recall.