1427080 - Intermittent scrolling/fixed-text-1.html == http://localhost:49826/1514144924934/191/fixed-text-1.html?ref | image comparison, max difference: 192, number of differing pixels: 112

Status: RESOLVED WORKSFORME

(Core :: Layout, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: apavel [at] mozilla.com

https://treeherder.mozilla.org/logviewer.html#?job_id=153306769&repo=mozilla-central

https://archive.mozilla.org/pub/firefox/tinderbox-builds/mozilla-central-win64-debug/mozilla-central_win10_64-debug_test-reftest-2-bm109-tests1-windows-build127.txt.gz

https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://archive.mozilla.org/pub/firefox/tinderbox-builds/mozilla-central-win64-debug/mozilla-central_win10_64-debug_test-reftest-2-bm109-tests1-windows-build127.txt.gz&only_show_unexpected=1

12:05:12     INFO - REFTEST TEST-START | file:///C:/slave/test/build/tests/reftest/tests/layout/reftests/scrolling/fixed-text-1.html == http://localhost:49826/1514144924934/191/fixed-text-1.html?ref
12:05:12     INFO - REFTEST TEST-LOAD | http://localhost:49826/1514144924934/191/fixed-text-1.html | 3930 / 7903 (49%)
12:05:12     INFO - ++DOMWINDOW == 38 (000002659EA53000) [pid = 6972] [serial = 10354] [outer = 00000265964E3E10]
12:05:13     INFO - REFTEST TEST-LOAD | http://localhost:49826/1514144924934/191/fixed-text-1.html?ref | 3930 / 7903 (49%)
12:05:13     INFO - ++DOMWINDOW == 39 (000002659EA5E800) [pid = 6972] [serial = 10355] [outer = 00000265964E3E10]
12:05:14     INFO - REFTEST TEST-UNEXPECTED-FAIL | file:///C:/slave/test/build/tests/reftest/tests/layout/reftests/scrolling/fixed-text-1.html == http://localhost:49826/1514144924934/191/fixed-text-1.html?ref | image comparison, max difference: 192, number of differing pixels: 112
12:05:14     INFO - REFTEST INFO | Saved log: START http://localhost:49826/1514144924934/191/fixed-text-1.html
12:05:14     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
12:05:14     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
12:05:14     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
12:05:14     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
12:05:14     INFO - REFTEST INFO | Saved log: RecordResult fired
12:05:14     INFO - REFTEST INFO | Saved log: START http://localhost:49826/1514144924934/191/fixed-text-1.html?ref
12:05:14     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
12:05:14     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
12:05:14     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
12:05:14     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
12:05:14     INFO - REFTEST INFO | Saved log: RecordResult fired
12:05:14     INFO - REFTEST TEST-END | file:///C:/slave/test/build/tests/reftest/tests/layout/reftests/scrolling/fixed-text-1.html == http://localhost:49826/1514144924934/191/fixed-text-1.html?ref
12:05:14     INFO - ++DOMWINDOW == 40 (000002659DA08800) [pid = 6972] [serial = 10356] [outer = 00000265964E3E10]
12:05:14     INFO - REFTEST TEST-START | file:///C:/slave/test/build/tests/reftest/tests/layout/reftests/scrolling/fixed-text-2.html == http://localhost:49826/1514144924935/192/fixed-text-2.html?ref
12:05:14     INFO - REFTEST TEST-LOAD | http://localhost:49826/1514144924935/192/fixed-text-2.html | 3931 / 7903 (49%)
12:05:14     INFO - ++DOMWINDOW == 41 (000002659EA24800) [pid = 6972] [serial = 10357] [outer = 00000265964E3E10]
12:05:15     INFO - REFTEST TEST-LOAD | http://localhost:49826/1514144924935/192/fixed-text-2.html?ref | 3931 / 7903 (49%)
12:05:15     INFO - ++DOMWINDOW == 42 (000002659EAB7000) [pid = 6972] [serial = 10358] [outer = 00000265964E3E10]
12:05:16     INFO - REFTEST TEST-UNEXPECTED-FAIL | file:///C:/slave/test/build/tests/reftest/tests/layout/reftests/scrolling/fixed-text-2.html == http://localhost:49826/1514144924935/192/fixed-text-2.html?ref | image comparison, max difference: 16, number of differing pixels: 2
12:05:16     INFO - REFTEST INFO | Saved log: START http://localhost:49826/1514144924935/192/fixed-text-2.html
12:05:16     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
12:05:16     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
12:05:16     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
12:05:16     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
12:05:16     INFO - REFTEST INFO | Saved log: RecordResult fired
12:05:16     INFO - REFTEST INFO | Saved log: START http://localhost:49826/1514144924935/192/fixed-text-2.html?ref
12:05:16     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
12:05:16     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
12:05:16     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
12:05:16     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
12:05:16     INFO - REFTEST INFO | Saved log: RecordResult fired

Comment 1

[Daniel Holbert [:dholbert]]

Attachment: (wrong screenshot - ignore)

This failure (in fixed-text-1.html) looks like it might've been bad memory, or something like that.

The mismatching pixels are some randomly-distributed green squares sprinkled around, towards the bottom of the viewport (far away from the text).

So: hopefully this was a random one-off that never happens again, but I guess we'll see.

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: screenshot of just the mismatching part of the testcase

Oops, I attached the wrong file. Here's the real screenshot of the failing region of the testcase (from cropping the test failure reftest-snapshot), showing the weird green squares.

Comment 3

[Daniel Holbert [:dholbert]]

--> WFM since this isn't happening anymore (though that's to be expected, given that this was probably a random one-off as noted above)