Re: Calc window handling

[martin rudalics <rudalics@gmx.at>]

 > Something broke in the calc window handling recently, at least in my CVS
 > build.  I don't know whether calc, or Emacs's window management is at
 > fault.
 >
 >  emacs -Q
 >  M-x calc
 >  q
 >
 >    => The selected buffer is the Calc buffer, as the only window on the
 >       frame.  The Calc buffer is supposed to be buried!
 >
 > Did you change anything in Calc that might have caused this?

Jay didn't do anything.  I recently changed `delete-windows-on' to make
a nil argument default to the current buffer and it seems `calc-quit' is
calling `delete-windows-on' a couple of times with argument nil _not_
meaning the current buffer.  I felt quite sure about my change because
according to the documentation nil was not considered a valid argument
till now for `delete-windows-on' and most other functions in this area
have nil stand for the current buffer.

martin