Closed Bug 1472237 Opened 2 years ago Closed 2 years ago
_bug590812 .html | noxul domain same as ref
47 bytes, text/x-phabricator-request
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2.45 KB, image/png
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Filed by: btara [at] mozilla.com https://treeherder.mozilla.org/logviewer.html#?job_id=185586643&repo=mozilla-inbound https://queue.taskcluster.net/v1/task/F2DDaQXXSDSHMmhscnRgyA/runs/0/artifacts/public/logs/live_backing.log [task 2018-06-29T14:50:25.194Z] INFO - TEST-START | dom/base/test/test_bug590812.html [task 2018-06-29T14:50:25.415Z] INFO - TEST-INFO | started process screentopng [task 2018-06-29T14:50:26.482Z] INFO - TEST-INFO | screentopng: exit 0 [task 2018-06-29T14:50:26.483Z] INFO - TEST-UNEXPECTED-FAIL | dom/base/test/test_bug590812.html | noxul domain same as ref [task 2018-06-29T14:50:26.483Z] INFO - runTest@dom/base/test/test_bug590812.html:25:3 [task 2018-06-29T14:50:26.483Z] INFO - onload@dom/base/test/test_bug590812.html:1:1 [task 2018-06-29T14:50:26.483Z] INFO - TEST-PASS | dom/base/test/test_bug590812.html | xul supporting domain same as ref [task 2018-06-29T14:50:26.483Z] INFO - GECKO(4612) | MEMORY STAT | vsize 1925MB | residentFast 189MB | heapAllocated 22MB [task 2018-06-29T14:50:26.483Z] INFO - TEST-OK | dom/base/test/test_bug590812.html | took 235ms
Hi Brian, I wonder... with XUL going away, I wonder if we should just let this test get disabled? A lot of failures tho, so unsure what to do.
Priority: -- → P3
(In reply to Marcos Caceres [:marcosc] (triage duty) from comment #17) > Hi Brian, I wonder... with XUL going away, I wonder if we should just let > this test get disabled? A lot of failures tho, so unsure what to do. Looking at the test, I don't think this has a lot to do with XUL. It seems to just be testing the XML pretty print feature on two different domains (one which allows remote xul and one which doesn't). If it was only failing on the one that allowed remote xul that'd be one thing (given Bug 1460732), but the description it seems to indicate the failure is on the "non-remote-xul" domain which would be basically like a normal website (where this feature should work). Though I wonder if this has to do with the iframe loaded over http://noxul.example.com/ not being having finished loading when the snapshots are compared? I notice we are only waiting [onload] on the test's window, and maybe there's a race in which we should be waiting for the subframes to load before doing the checks.
Wow! Thanks for the great analysis - I think you are right. Ok, I'll put up a quick patch that waits for the iframes to explicitly load.
Waits for each iframe to load before actually doing comparisons.
Unfortunately, the patch didn't fix it. I ran it 5000 times and the error is still showing up: Ran 20004 checks (5001 tests, 10002 subtests, 5001 asserts) Expected results: 19978 Unexpected results: 26 FAIL noxul domain same as ref runTest@dom/base/test/test_bug590812.html:41:3 async*onload@dom/base/test/test_bug590812.html:1:1
What's the failing window look like? Is it just the non-pretty-printed version of the XML?
(In reply to Brian Grinstead [:bgrins] from comment #23) > What's the failing window look like? Is it just the non-pretty-printed > version of the XML? So, not sure if this is expected, but the fail window doesn't show the results (it's just blank). However, I was able to dump the ref image, and indeed it's not being pretty printed: it just has "Here be sea hags", black text, white background. Another unfortunate thing... it's a Heisenbug. When the debugger console is open, it's not reproducible.
Pushed by email@example.com: https://hg.mozilla.org/integration/autoland/rev/6a72d0e28508 Intermittent dom/base/test/test_bug590812.html | noxul domain same as ref. r=bgrins
Backed out changeset 6a72d0e28508 (bug 1472237) for raising failure frequency for dom/base/test/test_bug590812.html push that caused the backout: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&searchStr=84bef5e1fbb573035d1bc42d9a3079b604693ee9&selectedJob=210273004&revision=6a72d0e28508814fd8b35d05ef12c129c00b29f9 failure: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&searchStr=linux%2Cx64%2Cquantumrender%2Copt%2Cmochitests%2Cwith%2Ce10s%2Ctest-linux64-qr%2Fopt-mochitest-e10s-1%2Cm-e10s%281%29&fromchange=2f968d0631f513abd33a76f564a9c2b32377216c&selectedJob=210273004 backout: https://hg.mozilla.org/integration/autoland/rev/891cd385f0ae6c38b8a218dde732ff467ea2af0f
heh, amazing. Made it worse :) Ok, will think of different approach.
:marcos are there any updates?
No, unfortunately. We might need to move a level deeper to someone that knows the syntax highlighting code.
Un-assigning myself, as I've probably reached the limit of what I can try without delving much deeper. @overholt, unfortunately the test was created by someone who is no longer at Mozilla. Do you have any suggestions for someone else we might as for help? This is related to XML pretty printing.
Assignee: mcaceres → nobody
Hmm, is this a regression from bug 1437956
Flags: needinfo?(overholt) → needinfo?(timdream)
My hypnosis of the cause would be that the xmlprettyprint CSS didn't load when runTest() runs, given that we are using normal Shadow Root here. I am going to mark the Shadow Root as UA Widget Shadow Root, so we could profit from bug 1431255 comment XIII.
Assignee: nobody → timdream
Status: NEW → ASSIGNED
(In reply to Tim Guan-tin Chien [:timdream] (please needinfo) from comment #37) > I am going to mark the Shadow Root as UA Widget Shadow Root, so we could > profit from bug 1431255 comment XIII. *commit* Part XIII, https://hg.mozilla.org/mozilla-central/rev/dca187f7c72c
https://treeherder.mozilla.org/#/jobs?repo=try&revision=293530eb072803ce532a254183ae17727b9ef28f Geez do we ever update the TryChooser??
That didn't work... I don't think we need to wait for onload event of the iframes because the parent frame should have its onload runs before that, but I might be wrong and it doesn't hurt trying. https://treeherder.mozilla.org/#/jobs?repo=try&revision=8542279565a102c29d9920c29dae77a93a82b85b
Still failing unfortunately 😿
Let's get the snapshots as data URLs when the tests fail. https://treeherder.mozilla.org/#/jobs?repo=try&revision=afeb28bd60c8016c56d908ba1ca781258aa6d82b
Hum, I've just reproduced the finding in comment 24. I should have the read the bug more carefully. So if that's the case, either something had triggered the XML pretty print to bail out, or it was never applied for some reason. A few printf() in nsXMLPrettyPrint.cpp should allow us to dive deeper. I will prepare the patch shortly.
(In reply to Tim Guan-tin Chien [:timdream] (please needinfo) from comment #46) https://treeherder.mozilla.org/#/jobs?repo=try&revision=562728d1ecd890f3a7d0eb6813a0d0d957a94e52
The result from the try push shows that nsXMLPrettyPrinter::PrettyPrint() is never called, at least not to line 130. This is strange because I didn't change things a lot before line 130 https://searchfox.org/mozilla-central/diff/b9a40e754b2d29dbbe83ec66a0963803876e4646/dom/xml/nsXMLPrettyPrinter.cpp#132 This is going to take a lot more printf() ...
https://treeherder.mozilla.org/#/jobs?repo=try&revision=4811ecc33c980d8bd6c316ff90a3d9ea6776eef8 My recollection is that XML document rendering always reaches nsXMLContentSink, so these printf should allow us to find out why it had given up pretty printing.
So according to comment 49, nsXMLPrettyPrint::PrettyPrint() thinks iframe is not visible. https://treeherder.mozilla.org/logviewer.html#?job_id=212052039&repo=try&lineNumber=10604 https://searchfox.org/mozilla-central/rev/c0b26c40769a1e5607a1ae8be37fe64df64fc55e/dom/xml/nsXMLPrettyPrinter.cpp#48-52
Let's try to load the XMLs to already created iframes https://treeherder.mozilla.org/#/jobs?repo=try&revision=3b0601fcb3ae805ff06b451cb077217522705bc2
The alternative fix would be simply drop the lines that tap into nsIPresShell, since we are no longer using XBL binding for pretty printing and the related code was just removed in bug 1503019, there is no reason to not pretty print if there isn't a presshell.
(In reply to Tim Guan-tin Chien [:timdream] (please needinfo) from comment #52) https://treeherder.mozilla.org/#/jobs?repo=try&revision=3e70dbe529a485e60ae2fab39b40f0947ad5b0ab Yet another good clean-up resulting from XBL removal :)
ML pretty print, as it was implemented in bug 64945, skips itself when the loaded document is not visible. There is no explanation why it does that, other than the fact that it is backed by an XBL binding, and XBL bindings always bound to DOM with layout frames. A later change in bug 1400618 made the existence of pressshell necessary before binding the XBL binding. With bug 1437956 and bug 1503019, XML pretty print is now backed by Shadow DOM. That leaves no reason for keeping this behavior. The test file test_bug590812.html also revealed that XML pretty print might incorrectly opt-out itself because of the said behavior. We don't know if this something only happens in the test or it is something that may happen in the wild. Nonetheless, it's a better idea to simplify the behavior here.
I've made my best attempt to justify the cleanup. Please let me know if the above commit message is incorrect or unclear. https://treeherder.mozilla.org/#/jobs?repo=try&revision=02b7fbd0f4ad9c07aa4b3da2901134c5ff6c260f :mats did the change in bug 1400618 related to presshell so I guess he should review this. Let me know if I should flag someone else (though I would like to avoid overloading :bz for this rather localized change).
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/autoland/rev/0e6465e2cdf4 Always do XML Pretty print even if the frame is hidden r=mats
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