Package bug or am I wedged?

[Joe Marshall <jrm@packetclustr.com>]

I'll admit that I am quite new to these scheme48 packages, but the
following behavior that seems buggy to me.  (It certainly isn't
referentially transparent).

The file  "/PacketCluster/R/IOWA.DAT" contains variable length records
separated by a control-c.  I am using scsh 0.3

> (define foo (open-input-file "/PacketCluster/R/IOWA.DAT"))
> ((record-reader (ascii->char 3)) foo)

Error: Bad argument
       #{Extensible-input-port}
       #{Procedure 50}
       #{Procedure 7972}
1> ,reset

> record-reader
'#{Procedure 7980}

> ,in field-reader-package

field-reader-package> (define foo (open-input-file "/PacketCluster/R/IOWA.DAT"))
field-reader-package> ((record-reader (ascii->char 3)) foo)
"051338SYS 0000DB501338 05DEC94 INVALID DATA FIELD OF SKDJFLKJSDFLKJDKFJJF  "

field-reader-package> record-reader
'#{Procedure 7980}