Try run for reference: https://treeherder.mozilla.org/#/jobs?repo=try&revision=29c9e0c496247bae5cb36c01a3ca8a947359607f&selectedJob=95098626 This occurs when the mochitest plain is run on the 16.04 docker image https://treeherder.mozilla.org/logviewer.html#?job_id=95098626&repo=try&lineNumber=5319

here is data from the log mentioned in comment 0: task 2017-04-28T09:35:32.556986Z] 09:35:32 INFO - TEST-START | editor/libeditor/tests/test_dragdrop.html [task 2017-04-28T09:35:33.120378Z] 09:35:33 INFO - GECKO(1324) | ++DOMWINDOW == 76 (0x7fac42c49800) [pid = 1324] [serial = 434] [outer = 0x7fac4afa4800] [task 2017-04-28T09:35:33.289930Z] 09:35:33 INFO - GECKO(1324) | [1324] WARNING: Unable to find interface object on global: file /home/worker/workspace/build/src/dom/base/nsDOMClassInfo.cpp, line 1855 [task 2017-04-28T09:35:33.601074Z] 09:35:33 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Test dragging regular text [task 2017-04-28T09:35:33.601622Z] 09:35:33 INFO - input.selectionStart [task 2017-04-28T09:35:33.608264Z] 09:35:33 INFO - 1 [task 2017-04-28T09:35:33.614203Z] 09:35:33 INFO - input.selectionEnd [task 2017-04-28T09:35:33.618492Z] 09:35:33 INFO - 4 [task 2017-04-28T09:35:33.679130Z] 09:35:33 INFO - TEST-INFO | started process screentopng [task 2017-04-28T09:35:37.217432Z] 09:35:37 INFO - TEST-INFO | screentopng: exit 0 [task 2017-04-28T09:35:37.221223Z] 09:35:37 INFO - Buffered messages logged at 09:35:33 [task 2017-04-28T09:35:37.225417Z] 09:35:37 INFO - must wait for load [task 2017-04-28T09:35:37.231506Z] 09:35:37 INFO - Buffered messages finished [task 2017-04-28T09:35:37.237344Z] 09:35:37 INFO - TEST-UNEXPECTED-FAIL | editor/libeditor/tests/test_dragdrop.html | Test dragging input - got "trapDrag was not called", expected null [task 2017-04-28T09:35:37.243893Z] 09:35:37 INFO - SimpleTest.is@SimpleTest/SimpleTest.js:310:5 [task 2017-04-28T09:35:37.246414Z] 09:35:37 INFO - doTest@editor/libeditor/tests/test_dragdrop.html:56:3 [task 2017-04-28T09:35:37.248719Z] 09:35:37 INFO - focusedOrLoaded/<@SimpleTest/SimpleTest.js:791:59 [task 2017-04-28T09:35:37.251716Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Test dragging textarea [task 2017-04-28T09:35:37.255942Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Test dragging contenteditable [task 2017-04-28T09:35:37.263155Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto input [task 2017-04-28T09:35:37.265876Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto disabled input [task 2017-04-28T09:35:37.268113Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto readonly input [task 2017-04-28T09:35:37.270553Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto input [task 2017-04-28T09:35:37.277518Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html and text/plain onto input [task 2017-04-28T09:35:37.282166Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/x-moz-text-internal onto input [task 2017-04-28T09:35:37.285317Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/plain onto contenteditable child nodes [task 2017-04-28T09:35:37.291829Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/plain onto contenteditable text [task 2017-04-28T09:35:37.297204Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto contenteditable child nodes [task 2017-04-28T09:35:37.300591Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto contenteditable italic [task 2017-04-28T09:35:37.304779Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag text/html onto contenteditable italic text [task 2017-04-28T09:35:37.315380Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Move text/html and text/plain from contenteditable onto input [task 2017-04-28T09:35:37.318227Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Move text/html and text/plain from contenteditable onto itself child nodes [task 2017-04-28T09:35:37.320346Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Move text/html and text/plain from contenteditable onto itself italic [task 2017-04-28T09:35:37.327797Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Move text/html and text/plain from contenteditable onto itself text [task 2017-04-28T09:35:37.332181Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.334730Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.337048Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.341327Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.344048Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.347088Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.353014Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.355870Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.360665Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(root) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 3477 [task 2017-04-28T09:35:37.363327Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: NS_ENSURE_TRUE(target) failed: file /home/worker/workspace/build/src/editor/libeditor/EditorBase.cpp, line 1925 [task 2017-04-28T09:35:37.370077Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: 'selection.mReply.mContentsRoot != mRootContent', file /home/worker/workspace/build/src/dom/events/IMEContentObserver.cpp, line 1338 [task 2017-04-28T09:35:37.373093Z] 09:35:37 INFO - GECKO(1324) | [1324] WARNING: '!mIMEContentObserver->UpdateSelectionCache()', file /home/worker/workspace/build/src/dom/events/IMEContentObserver.cpp, line 1773 [task 2017-04-28T09:35:37.375270Z] 09:35:37 INFO - TEST-PASS | editor/libeditor/tests/test_dragdrop.html | Drag non-editable text/html onto contenteditable text [task 2017-04-28T09:35:37.377431Z] 09:35:37 INFO - GECKO(1324) | MEMORY STAT | vsize 2134MB | residentFast 301MB | heapAllocated 120MB [task 2017-04-28T09:35:37.379486Z] 09:35:37 INFO - TEST-OK | editor/libeditor/tests/test_dragdrop.html | took 3239ms that failure seems to be here in the test case: https://dxr.mozilla.org/mozilla-central/source/editor/libeditor/tests/test_dragdrop.html?q=path%3Atest_dragdrop.html&redirect_type=single#52 what is interesting is this fails for a type <input> and nothing else, possibly 16.04 has a different theme for <input> elements? :jet, who could help us figure this out?

sorry, my comments were related to test_dragdrop.html, not test_bug348236.html what the summary was filed as :(

my comment for test_dragdrop.html is already tracked in bug 1335880

This test and the one for bug 1335880 synthesize user gestures at specific pixel offsets. Can we overlay screenshots from ubuntu 12 & 16.04? I suspect the content shifted under us (due to font and/or theme variation) and the synthesized mouse moves expect the old offsets.

oh, good point we can figure that out!

I forced a ok() statement to be false and got a screenshot for a 12.04 image. 16.04: https://public-artifacts.taskcluster.net/IoPAnGFqSEiN975AtKCrOg/0/public/test_info//mozilla-test-fail-screenshot_oWf57p.png 12.04: https://public-artifacts.taskcluster.net/FDpVOzAISMKiXfCdMUDLCQ/0/public/test_info//mozilla-test-fail-screenshot_E8oilZ.png there are many differences in the screenshots, I also think I didn't get them at the same spot.

Here's a patch for this bug: https://hg.mozilla.org/try/rev/e07842093f48bc01eadfa1dad050af93323b26ae The failures seen in that push are all intermittent. It's based on the solution for bug 1335880 which adjusts the y position of the mouse by moving it down 2 pixels. Shall I submit this patch for review? (Minus the .yml changes).

Comment on attachment 8870506 [details] Bug 1360559 - Adjust mouse position in test_bug348236.html. https://reviewboard.mozilla.org/r/141934/#review145632 on the condition there is a try push showing |try -b do -p all -u mochitests -t none|

Pushed by jmaher@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/2b7bf0df3681 Adjust mouse position in test_bug348236.html. r=jmaher

Backed out for causing frequent test_bug533845.xul timeouts, at least on Linux. https://hg.mozilla.org/integration/autoland/rev/8932c23936f519c382fef5588a7d7ff67f7cd8c3 https://treeherder.mozilla.org/logviewer.html#?job_id=101672007&repo=autoland

Not sure what's changed but a very similar same patch (with no significant changes) is working today: https://treeherder.mozilla.org/#/jobs?repo=try&revision=844e6d4f1cf65464cdd672a2b1533ff3cfdbb840 These additional changes don't do anything to fix the tests though, here's a test which uses them and still fails: https://treeherder.mozilla.org/#/jobs?repo=try&revision=5587978b41faa7e451d5b06fb67b1c7b5ca42a9f Joel, do you think we could try landing this patch again?

can you push to try with the original patch? the try pushes you have are forcing PGO, I want to see if the original patch works good on try with 10 retriggers.

I think the trychooser is slightly out of date or I may have misunderstood because it seems like it said to add that line to get linux64-pgo to run. But apparently I didn't need it since it was scheduled without it in this try run. Either way, here's the push with the retriggers: https://treeherder.mozilla.org/#/jobs?repo=try&revision=63a8d8ed2eb19a8c351cbff51388d48ea97bb8ae The PGO tests are still running at the moment but the linux64 tests seem promising.

Pushed by jmaher@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/648eadae5964 Adjust mouse position in test_bug348236.html. r=jmaher