Created attachment 8676188 [details] testcase Build Identifier: https://hg.mozilla.org/integration/mozilla-inbound/rev/da38bd42a863a6b3228500912a1bb2766ff79166 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0 ID:20151020024007 Steps To Reproduce: 1. Open attached testcase 2. mouse over scrollbar(not thumb) of Box1 and turn mouse wheel one tick --- may work as expected if no scrollbar on root element 3. mouse over scrollbar(not thumb) of Box2 and turn mouse wheel one tick --- does not work, BUG!!! 4. mouse over scrollbar(not thumb) of Box3 and turn mouse wheel one tick --- does not work, BUG!!! Actual Results: Not scroll the element. However, It may work 2nd tick Expected Results: these elements should scroll properly Bug 1190112 and Bug 1213324 did not fix the problem. It works when disable APZ
Created attachment 8677099 [details] [diff] [review] bug1216488.patch Silly bug in the patch for bug 1213324 prevented this test case from being fixed too. We can't use NULL_SCROLL_ID to check whether we're building a scrollbar frame since that's used when the scrollframe isn't active.
Assignee: nobody → dvander
Status: NEW → ASSIGNED
Attachment #8677099 - Flags: review?(tnikkel)
Attachment #8677099 - Flags: review?(tnikkel) → review+
Status: ASSIGNED → RESOLVED
Last Resolved: 3 years ago
status-firefox44: affected → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla44
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