This bug report is for Squeak 3.7alfa, latest update: #5566

from the preamble:

In MVC, you encounter an error when you are in the debugger and
try to bring up the code pane menu.
In the expression

thisContext sender receiver selectionInterval

the method #receiver returns an instance of PluggableTextView, which does
not understand the message selectionInterval. In Morphic, the method
#receiver
returns a PluggableTextMorph, which understands #selectionInterval. It is
clear that compatible protocols would fix that problem, therefore
the method #selectionInterval was added to  PluggableTextView


-------------- next part --------------
A non-text attachment was scrubbed...
Name: TextView.2.cs
Type: application/octet-stream
Size: 844 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20031126/137fba1a/TextView.2.obj