Xnews regression from update region handling

Rein Klazes wijn at wanadoo.nl
Sat Jan 29 13:06:12 CST 2005


After the update region handling moved to the server, Xnews gets in an
endless loop when the windows with news groups is scrolled.

The endless loop is in user/painting.c. Calling sequence is
ScrollWindowEx(... SW_ERASE|SW_INVALIDATE)->

In erase_now() the aptly coded endless loop is never broken out, and
loops on the same window over and over. Before the change this was coded
quite differently (traversing the window's child tree) and could not
loop indefinitely. I am quite stuck what should be the reason why the
loop is expected to end in the first place. Perhaps you want to have a

Xnews can be downloaded from all over the net, for example:

Unzip it in a directory of your choice; run xnews.exe; enter the host
name of a news server; confirm that you want to download the list of
newsgroups; you get a window with newsgroups, try to scroll down the


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