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Re: Overlay evaporates when it should not

From: Richard Stallman
Subject: Re: Overlay evaporates when it should not
Date: Fri, 16 Jul 2004 12:09:45 -0400

    The Elisp manual says of the overlay evaporate property:

         If this property is non-`nil', the overlay is deleted automatically
         if it becomes empty (i.e., if its length becomes zero).  However,
         if the overlay is _already_ empty, `evaporate' does not delete it.

Foverlay_put has explicit code to delete an empty overlay
if you give it a non-nil evaporate property.  It has been there
for 10 years.  So I'll change the manual.


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