[Chicken-janitors] #978: Ports don't keep track of "column" anymore - restore this

[Chicken Trac]

#978: Ports don't keep track of "column" anymore - restore this
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 Reporter:  sjamaan          |       Owner:  sjamaan
     Type:  defect           |      Status:  new    
 Priority:  minor            |   Milestone:  4.9.0  
Component:  core libraries   |     Version:  4.8.x  
 Keywords:  ports, position  |  
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 Slot 5 is no longer being updated by any port procedure except read-char.
 This causes port-position to return useless values.

 This should be restored for read-line and friends.

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Ticket URL: <http://bugs.call-cc.org/ticket/978>
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