Rob Browning <rlb@defaultvalue.org> writes:
>
> Offhand, I'd guess some kind of exception would be in order.

        * strports.c (scm_call_with_output_string): scm_get_output_string
        rather than scm_strport_to_string, so as to guard against the port
        having been closed by the called procedure.

        * tests/ports.test (call-with-output-string): Test proc closing port.

        * scheme-io.texi (String Ports): In call-with-output-string, note proc
        should not close the port.  In get-output-string, note string must be
        gotten before closing the port.

This would be a candidate for the 1.6 branch too, if the solution
seems ok.