Invariant violated in TextViews.AdjustLines

[aixp]

Steps to reproduce

1. Write openbsd in Log.
2. Select it (double-click with mouse).
3. Call menu Info → Search In Sources.
4. Click on Comm/Mod/TCP.odc.
5. Scroll down with the mouse.

Expected result

Normal scrolling without errors.

Actual result

Invariant violation occurs in TextViews.AdjustLines at:

ASSERT(t0.next.start = org, 100)