one of the classical mangleme testcases (nearly) hangs mozilla. It looks like in xul we coerce a large number to NS_UNCONSTRAINEDSIZE and have a styled height with a NS_UNCONSTRAINEDSIZE predefined height and and start looping.

the coerce demo will cause in a debug build: nsBlockReflowContext: HTMLScroll(div)(0)@03475F1C metrics=13392,1073741824! nsBlockReflowContext: Block(body)(2)@034746D4 metrics=13392,1073741824! nsBlockReflowContext: HTMLScroll(div)(0)@03475F1C metrics=13152,1073741824! nsBlockReflowContext: Block(body)(2)@034746D4 metrics=13152,1073741824! ###!!! ASSERTION: non-root frame's desired size changed during an incremental re flow: 'first == root || (aDesiredSize.width == size.width && aDesiredSize.height == size.height)', file e:/moz_src/mozilla/layout/base/nsPresShell.cpp, line 905

the default for a computed max height is NS_UNCONSTRAINEDSIZE this corresponds to 0x40000000.On my machine the large height is just above that, somewhere around 0x46......, so we coerce the preferered size in xul to NS_UNCONSTRAINEDSIZE.

Url testcase freezes in 2005-04-28 build, but works in 2005-04-29 build. Probably fixed by bug 240276?

WFM with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20050816 Firefox/1.6a1 Should this be marked as fixed?

WFM on Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b4) Gecko/20050910 Firefox/1.4 -> WFM