63646 2011-06-29 12:23:45 -0700 Crash in SVGUseElement::updateContainerOffsets on <use> with no parent 2011-07-24 19:17:41 -0700 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 thorton rwlbuis adele rwlbuis zimmermann oldest_to_newest 429784 0 99126 thorton 2011-06-29 12:23:45 -0700 Created attachment 99126 test case The attached SVG crashes WebKit in SVGUseElement::updateContainerOffsets. In a debug build, we get an ASSERTion failure saying that the <use> element doesn't have a parentNode. 429785 1 thorton 2011-06-29 12:24:15 -0700 <rdar://problem/9630764> 430246 2 zimmermann 2011-06-30 01:31:00 -0700 > Created an attachment (id=99126) [details] > test case > > The attached SVG crashes WebKit in SVGUseElement::updateContainerOffsets. Excellent catch. Tim, where have you been all the years? :-) Your work is highly appreciated. > > In a debug build, we get an ASSERTion failure saying that the <use> element doesn't have a parentNode. That's not correct, the <use> has a parentNode - it's shadow tree root element (living in the <use> renderer) lost its parent. Do you feel like debugging? :-) 430509 3 thorton 2011-06-30 10:10:48 -0700 (In reply to comment #2) > > Created an attachment (id=99126) [details] [details] > > test case > > > > The attached SVG crashes WebKit in SVGUseElement::updateContainerOffsets. > Excellent catch. Tim, where have you been all the years? :-) Your work is highly appreciated. > > > > > In a debug build, we get an ASSERTion failure saying that the <use> element doesn't have a parentNode. > That's not correct, the <use> has a parentNode - it's shadow tree root element (living in the <use> renderer) lost its parent. Alright, that makes a lot more sense. > Do you feel like debugging? :-) Now that you've explained it correctly, I think it'll be easier to figure it out, so sure! (I couldn't make my explanation make any sense given what was actually going on in the document, but I figured someone else would have some insight, and you did!) 430876 4 thorton 2011-06-30 17:19:46 -0700 Nope, I think this one is beyond me for now. It's clear that it's because we're unlinking the middle use in the chain from its child content, but I can't follow exactly where we diverge from the case where the first use in the chain (the last one in the file) doesn't exist. I don't know enough about the shadow tree and friends to track this one down yet. Feels like we're just failing to detachInstance() or something, but I'm not sure where. 432057 5 99658 rwlbuis 2011-07-04 14:48:56 -0700 Created attachment 99658 Patch 432303 6 thorton 2011-07-05 09:55:19 -0700 (In reply to comment #5) > Created an attachment (id=99658) [details] > Patch Rob's patch is certainly sufficient to fix the symptom; should we at least take this for now and figure out the root cause later? 432339 7 zimmermann 2011-07-05 11:06:28 -0700 (In reply to comment #6) > (In reply to comment #5) > > Created an attachment (id=99658) [details] [details] > > Patch > > Rob's patch is certainly sufficient to fix the symptom; should we at least take this for now and figure out the root cause later? Are we in hurry with a fix for this? If so yes, but I don't think so. We should rather find out if the null parentNode is "okay", or not. Rob? 441526 8 101844 rwlbuis 2011-07-24 18:33:03 -0700 Created attachment 101844 Patch 441527 9 rwlbuis 2011-07-24 18:34:04 -0700 Hi Niko, (In reply to comment #7) > (In reply to comment #6) > > (In reply to comment #5) > > > Created an attachment (id=99658) [details] [details] [details] > > > Patch > > > > Rob's patch is certainly sufficient to fix the symptom; should we at least take this for now and figure out the root cause later? > > Are we in hurry with a fix for this? If so yes, but I don't think so. We should rather find out if the null parentNode is "okay", or not. Rob? I uploaded a new patch, hopefully this fix is better and the ChangeLog should explain the problem. Cheers, Rob. 441533 10 rwlbuis 2011-07-24 19:17:41 -0700 Landed in r91653. 99126 2011-06-29 12:23:45 -0700 2011-06-29 12:23:45 -0700 test case 1-reduced2.svg image/svg+xml 341 thorton PD94bWwgdmVyc2lvbj0iMS4wIj8+CjxzdmcgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAv c3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayI+Cgo8dGV4dCBp ZD0iZm9yZWlnbiIgLz4KPHVzZSBpZD0idGVzdCIgeGxpbms6aHJlZj0iI2ZvcmVpZ24iIC8+Cjx1 c2UgeGxpbms6aHJlZj0iI3Rlc3QiIC8+Cgo8c2NyaXB0PgogICAgdmFyIGVsZW0gPSBkb2N1bWVu dC5nZXRFbGVtZW50QnlJZCgidGVzdCIpOwogICAgZWxlbS5yZW1vdmVBdHRyaWJ1dGUoInhsaW5r OmhyZWYiKTsKICAgIGVsZW0uc2V0QXR0cmlidXRlKCJ4IiwgMSk7Cjwvc2NyaXB0Pgo8L3N2Zz4= 99658 2011-07-04 14:48:56 -0700 2011-07-24 18:32:56 -0700 Patch bug-63646-20110704174935.patch text/plain 3258 rwlbuis SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDkwMzc3KQorKysgU291cmNlL1dlYkNvcmUvQ2hhbmdl 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