PR# 17679 Violation of assertion `not_possible' in {SD_TOOL_BAR_RESIZABLE_ITEM}.on_pointer_press

While playing with a workbench estudio, I got a violation of check assertion
`not_possible' in {SD_TOOL_BAR_RESIZABLE_ITEM}.on_pointer_press.
Local `l_tool_bar' was attached to an object of type SD_TOOL_BAR while
the routine was expecting it to be attached to an object of type
SD_WIDGET_TOOL_BAR.  Trace attached.

I was trying to resize an undocked tool bar from the lower right corner
when the violation occurred (but it might have happened slightly
before that).

Not reproducible at this time.

Not currently reproducible.

Actually, just undocking the Address toolbar, leaving it in its normal
shape (not very tall, but fairly wide) and then trying to resize the
Feature combo box wider seems to cause this assertion violation every time.

I have now found out how to reproduce this.

Undock the Address tool bar.
Left-click and hold on the right edge of the Feature combo box arrow,
  as though you were going to resize this combo box wider.
With left button still depressed, move the mouse down and to the
  left, as though you were trying to change the shape of the undocked
  Address tool bar.
Estudio crashes with violation of assertion `not_possible'.

Attachments for problem report #17679