Date: 5 Aug 86 11:09 PDT
From: Masinter.pa@Xerox.COM
I propose the following rule: "It is an error to attempt to close a
stream that wasn't created with open."
With this rule, it would follow that, since synonym, broadcast and
two-way streams are not created with open, it is an error to perform
"close" on them.
I think this is a fine suggestion.