On debug B2G emulators, the test content/html/content/test/forms/test_input_range_mouse_and_touch_events.html is failing due to multiple instances of the following assertion: 15:00:52 INFO - [Child 710] ###!!! ASSERTION: we should be in a pseudo-element that is expected to contain elements: 'nsCSSPseudoElements::PseudoElementContainsElements( topWithPseudoElementData->GetPseudo())', file ../../../gecko/layout/style/nsComputedDOMStyle.cpp, line 678 full log: https://tbpl.mozilla.org/php/getParsedLog.php?id=28954370&tree=Cedar&full=1#error2

smaug, can you take a quick look?

I know next to nothing about nsComputedDOMStyle::GetPropertyCSSValue David owns that code, I believe.

jwatt, could you have a look at this? It would be interesting to know which pseudo-element this is. (Given that we're hitting the assertion, it might be worth modifying the assertion code so that the assert text itself includes which pseudo-element it's hitting.)

I would look into this, but I've wasted many, many hours trying to get an emulator build over the last week. My latest issue is: https://groups.google.com/forum/#!topic/mozilla.dev.b2g/CMN1DizzHWc I think I've spent about as much time as I can afford on this though. Maybe when the B2G build process is less of a complete nightmare I can have another go.

FWIW I've emailed Vicamo (who has emulator expertise and is interested in helping with issues therein) and Gregor (whom I know uses OS X (but is involved with a work week this week)) about the emulator issue.

Thanks!

Comment on attachment 827642 [details] [diff] [review] patch to modify the assertion as suggested in comment 3 Could you put the whole thing inside the NS_ASSERTION macro so that it all goes away in non-DEBUG builds? (Probably the easiest way is to get rid of the 2 temporary variables and just make a bigger expression.) r=dbaron with that

That whole chunk of code is in an |#ifdef DEBUG| section, so that's not necessary.

Backed out for build failures on Windows: { e:\builds\moz2_slave\m-in-w32-d-0000000000000000000\build\config\rules.mk:1048:0$ mozbuild.action.cl main cl -FoStyleRule.obj -c -D_HAS_EXCEPTIONS=0 -I../../dist/stl_wrappers -DWIN32_LEAN_AND_MEAN -D_WIN32 -DWIN32 -D_CRT_RAND_S -DCERT_CHAIN_PARA_HAS_EXTRA_FIELDS -DOS_WIN=1 -D_UNICODE -DCHROMIUM_BUILD -DU_STATIC_IMPLEMENTATION -DUNICODE -DNOMINMAX -D_WINDOWS -D_SECURE_ATL -DCOMPILER_MSVC -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DNO_NSPR_10_SUPPORT -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/ipc/chromium/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/ipc/glue -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/obj-firefox/ipc/ipdl/_ipdlheaders -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../base -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/dom/base -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../generic -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../xul/base/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../../content/base/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../../content/html/content/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../../content/xbl/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/../../content/xul/document/src -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style -I. -I../../dist/include -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/obj-firefox/dist/include/nspr -Ie:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/obj-firefox/dist/include/nss -MDd -FI ../../dist/include/mozilla-config.h -DMOZILLA_CLIENT -wd4099 -TP -nologo -W3 -Gy -Fdgenerated.pdb -wd4251 -wd4244 -wd4345 -wd4351 -wd4482 -wd4800 -wd4819 -we4553 -GR- -DDEBUG -D_DEBUG -DTRACING -Zi -O1 -Oy- -WX e:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/layout/style/StyleRule.cpp <gkstyle_s.lib.desc>: Found error <libs>: Found error evaluation from e:\builds\moz2_slave\m-in-w32-d-0000000000000000000\build\config\recurse.mk:186:53:7:0: command 'C:/mozilla-build/python27/python.exe e:/builds/moz2_slave/m-in-w32-d-0000000000000000000/build/build/pymake/pymake/../make.py -C style libs' failed, return code 2 } remote: https://hg.mozilla.org/integration/mozilla-inbound/rev/dc13acdbd93f

That is...weird.

FWIW that WinXP failure push was: https://tbpl.mozilla.org/?tree=Mozilla-Inbound&rev=0f3b26ada540

I modified the patch to stop using temporaries and that seemed to make XP happy: https://hg.mozilla.org/integration/mozilla-inbound/rev/d94d3e54da67

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046 Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5. If you have questions, please contact :mdaly.