open-read/open-write

The functions 'open-read' and 'open-write' do not
raise errors. The current behavior is this:

"The empty list is returned when an error occurs while
opening the file. .."

I can see that this may be useful. But I believe the
alternative behavior--open-read/write raising an error and
printing an informative error message when the operation
fails--is useful more often than the current behavior.

Does anybody remember why the current behavior was chosen?
Does anybody object if I change open-read/open-write (and
open-append) in lush2 to raise errors?

Ralf


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