Closed Bug 1277123 Opened 6 years ago Closed 6 years ago
Can't interact with scroll bar on certain page
User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build ID: 20160531004027 Steps to reproduce: Url: http://www.intel.com/content/www/us/en/support/graphics-drivers/000005526.html Hovering over the scrollbar doesn't highlight the scrollbar and clicking and dragging results in selecting elements on the page.
Status: UNCONFIRMED → NEW
Component: Untriaged → Layout
Ever confirmed: true
Product: Firefox → Core
Regression window: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=cc9051869d1a9078a821da5d1639299f9e836e0e&tochange=1ee604ae873ffae665e745b3553fb1c406dbdd6a Regressed by: 1ee604ae873f Matt Woodrow — Bug 1265237 - Clear clipping for out-of-flow frames that we are descending into but haven't stored explicit clip data for. r=mstange
Let's track this scrollbar regression for 48 and 49. There is already a ni for Matt so I will wait for him to provide additional information.
This is a pretty core and commonly used functionality. Tagging this as a blocker for Fx48.
This is not reproducible on OS X for me, neither with overlay scrollbars nor with classic scrollbars.
Yeah, it seems to be Windows only (maybe Linux too, I haven't tried). I even tried removing "position: relative" and "z-index: maxint" from the scrollbars on mac (and using classic scrollbars) and that had no change. I don't have a reduced testcase yet, but there is a form inside a position: fixed element, with the position: fixed element having zero size that is causing the problem on the page. I'm continuing to work on it.
Reproduced on Ubuntu14.04 and Windows10
OS: Unspecified → All
Thank you for the reduced testcase!
Assignee: nobody → tnikkel
Timothy, do you have an eta for this bug? Thanks
On PTO, don't have a computer that can reproduce the bug with me.
Markus, do you know who could manage this? This is a blocking issue for 48.
Timothy should be back already.
Botond, can you try this patch again on your machine without any other patches applied? I think it should be correct. Just want to verify that it wasn't this patch that was causing the weird issues on your machine.
And compiles now.
Attachment #8767843 - Flags: feedback? → feedback?(botond)
Attachment #8767843 - Flags: review?(matt.woodrow) → review+
Comment on attachment 8767843 [details] [diff] [review] patch I can confirm that this patch fixes the reduced testcase for me on Linux. (I can't reproduce the problem on the original page.)
Attachment #8767843 - Flags: feedback?(botond) → feedback+
Sounds promising! If you land it please request uplift. I have it marked as a blocker for 48 release. So we will also likely test this once we land a fix on 48 and 49.
Pushed by email@example.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/6de59178cfa0 Only clear the containing block clip when entering an out of flow with an unknown clip. r=mattwoodrow
This missed the beta 7 build but could still make it into beta 8 later this week.
Comment on attachment 8767843 [details] [diff] [review] patch Approval Request Comment [Feature/regressing bug #]: bug 1265237 [User impact if declined]: scrollbars on some pages might not work, not a huge percentage of sites, but it clearly comes up [Describe test coverage new/current, TreeHerder]: none yet, working on a test [Risks and why]: not risky [String/UUID change made/needed]: none
Comment on attachment 8767843 [details] [diff] [review] patch Review of attachment 8767843 [details] [diff] [review]: ----------------------------------------------------------------- This patch fixes a regression. Take it in 48 beta 8 and aurora.
Verified as fixed using Firefox 48 beta 9, latest Aurora 49.0a2 and latest Nightly 50.0a1 2016-07-19 under Win 10 64-bit and Ubuntu 14.04 64-bit.
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