Comment 1 for bug 930915

Alan Wehmann continues:

I've been stepping through execution of VM 8.2.0b1 function
"vm-attach-message" with edebug. I've also done the same with the VM
8.1.1 function "vm-mime-attach-message".

In VM 8.2.0b1 function "vm-attach-message" the "(interactive" clause
contains a "(cond" structure & both clauses in that have the clause

(setq mlist (vm-select-operable-messages 1 t "Attach"))

While stepping, I note that this clause gives a non-null value to
mlist and that means that the following "(when (null mlist)" isn't
satisfied and I don't get asked for a message number.

Equivalent logic in the VM 8.1.1 function "vm-mime-attach-message" has

(setq mlist (vm-select-marked-or-prefixed-messages 0))

and when stepping through that, mlist is returned as nil and the test
"(if (null mlist)" is successful and I get asked for a message
number.