Steps to reproduce:

There are two ways. Either you can download the document I give in example
(http://www.ascor.ch/frame_crash.odt), select the "CORPS DE TEXTE" field and
push enter until it crashes (!), or follow the steps given here =)

1. Create a new document.
2. Create a frame in it. Don't touch the default settings.
3. Create another frame. Place it below the other one.
4. Set "anchor to char" in the second one, and place the anchor in the first frame.
5. Place the cursor inside the first frame and expand it - with carriage returns
(it will push the second one down the page).
6. Continue until you push the frames on the margin.

Expected result:
The first frame should continue to the second page, as the second one, which
sould stay at the same distance from the char it's anchored to.
Or at least, it should stop the carriage returns when it touches the end of the
page.

Actual results:
OOo crashes when the character the second frame is anchored to reaches the limit
of the page.
NB: Sometimes, it won't crash (if the second frame is on the right of the page
for example). To be sure it crashes, set the second frame's width to 100% of the
page writing zone.