16758 2008-01-05 16:48:05 -0800 ASSERT when using TreeWalker methods for a current node outside of the root (Acid3) 2008-01-08 23:11:52 -0800 1 1 1 Unclassified WebKit DOM 528+ (Nightly build) Mac OS X 10.4 RESOLVED FIXED P2 Normal --- 1 sam webkit-unassigned oldest_to_newest 66323 0 sam 2008-01-05 16:48:05 -0800 Running the Acid3 test in debug builds reveals an assertion failure: ASSERTION FAILED: !stayWithin || !n->nextSibling() || n->nextSibling()->isDescendantOf(stayWithin) (/Users/weinig/Code/webkit/OpenSource/WebCore/dom/Node.cpp:490 WebCore::Node* WebCore::Node::traverseNextNode(const WebCore::Node*) const) This stems from the TreeWalker class being able to set the currentNode to an arbitrary node but not checking that is within it's root node when using the traverseNextNode/traversePreviousNode functions. 66324 1 18291 sam 2008-01-05 16:50:58 -0800 Created attachment 18291 patch 66325 2 18291 eric 2008-01-05 17:07:42 -0800 Comment on attachment 18291 patch Looks great! 66328 3 sam 2008-01-05 18:38:00 -0800 Landed in r29203. 66631 4 18291 darin 2008-01-08 22:21:29 -0800 Comment on attachment 18291 patch This is wrong. If you read the TreeWalker documentation, you'll see that it has well defined behavior when used on nodes outside the original subtree. The code correctly implemented most of those rules before -- this patch broke it! I have a patch that fixes it. The test case expects behavior that is incorrect, so I need to change it around. 66633 5 darin 2008-01-08 22:32:10 -0800 Here is the relevant quote from the specification: "All the TreeWalker's navigation methods operate in terms of the context of the currentNode at the time they are invoked, no matter what has happened to, or around, that node since the last time the TreeWalker was accessed. This remains true even if the currentNode is moved out of its original subtree." And: "If we instead insert the currentNode into the <subtree/> element, like so: [...] we have moved the currentNode out from under the TreeWalker's root node. This does not invalidate the TreeWalker; it may still be used to navigate relative to the currentNode." The real fix here would be to remove the assertions, and I have done this in my new patch. 66637 6 darin 2008-01-08 22:52:55 -0800 The patch in bug 3492 addresses this. 66638 7 sam 2008-01-08 23:11:52 -0800 I realized after landing that this was not correct (but only now thought that the right corse of action would have been to roll it out). A fix I made is in bug 16759, but is probably not necessary with Darin's patch. 18291 2008-01-05 16:50:58 -0800 2008-01-08 22:21:29 -0800 patch patch.diff text/plain 8819 sam SW5kZXg6IFdlYkNvcmUvQ2hhbmdlTG9nCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIFdlYkNvcmUvQ2hhbmdlTG9n CShyZXZpc2lvbiAyOTE5OCkKKysrIFdlYkNvcmUvQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBA IC0xLDMgKzEsMjMgQEAKKzIwMDgtMDEtMDUgIFNhbSBXZWluaWcgIDxzYW1Ad2Via2l0Lm9yZz4K KworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBQYXRjaCBm b3IgaHR0cDovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MTY3NTgKKyAgICAgICAg QVNTRVJUIHdoZW4gdXNpbmcgVHJlZVdhbGtlciBtZXRob2RzIGZvciBhIGN1cnJlbnQgbm9kZSBv dXRzaWRlIG9mIHRoZSByb290IChBY2lkMykKKworICAgICAgICAtIEVuc3VyZSB0aGF0IHJldHVy bmVkIG5vZGVzIGFyZSB3aXRoaW4gdGhlIHJvb3Qgbm9kZSwgb3IgcmV0dXJuIDAsIGluIGFkaGVy ZW5jZSB3aXRoIHRoZSBzcGVjLgorCisgICAgICAgIFRlc3Q6IGZhc3QvZG9tL1RyZWVXYWxrZXIv 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