[Oberon] Viewer marking.

Andreas Pirklbauer andreas_pirklbauer at yahoo.com
Tue Mar 6 20:59:24 CET 2018

> Sort should terminate silently but traps or sorts an unmarked viewer.

Perhaps the reason why Sort traps is that Oberon.MarkedViewer
returns the filler viewer, whose fields Viewers.FillerViewer.dsc
and Viewers.FillerViewer.next are both always set to NIL.

More information about the Oberon mailing list