1652186 - Intermittent position-sticky/block-in-inline-continuations.html == position-sticky/block-in-inline-continuations-ref.html | image comparison, max difference: 255, number of differing pixels: 6800

Status: RESOLVED FIXED

(Core :: Layout: Positioned, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: btara [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=309381257&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/I1YH_f8vRpeSRKq5CMyWzg/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/I1YH_f8vRpeSRKq5CMyWzg/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---

[task 2020-07-10T21:47:50.551Z] 21:47:50     INFO - REFTEST TEST-START | layout/reftests/position-sticky/block-in-inline-continuations.html == layout/reftests/position-sticky/block-in-inline-continuations-ref.html
[task 2020-07-10T21:47:50.551Z] 21:47:50     INFO - REFTEST TEST-LOAD | file:///Z:/task_1594412983/build/tests/reftest/tests/layout/reftests/position-sticky/block-in-inline-continuations.html | 49 / 55 (89%)
[task 2020-07-10T21:47:50.603Z] 21:47:50     INFO - REFTEST TEST-LOAD | file:///Z:/task_1594412983/build/tests/reftest/tests/layout/reftests/position-sticky/block-in-inline-continuations-ref.html | 49 / 55 (89%)
[task 2020-07-10T21:47:50.740Z] 21:47:50     INFO - REFTEST TEST-UNEXPECTED-FAIL | layout/reftests/position-sticky/block-in-inline-continuations.html == layout/reftests/position-sticky/block-in-inline-continuations-ref.html | image comparison, max difference: 255, number of differing pixels: 6800
[task 2020-07-10T21:47:50.741Z] 21:47:50     INFO - REFTEST   IMAGE 1 (TEST): data:image/png;base64,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
[task 2020-07-10T21:47:50.742Z] 21:47:50     INFO - REFTEST   IMAGE 2 (REFERENCE): data:image/png;base64,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
[task 2020-07-10T21:47:50.742Z] 21:47:50     INFO - REFTEST INFO | Saved log: START file:///Z:/task_1594412983/build/tests/reftest/tests/layout/reftests/position-sticky/block-in-inline-continuations.html
[task 2020-07-10T21:47:50.742Z] 21:47:50     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
[task 2020-07-10T21:47:50.742Z] 21:47:50     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: RecordResult fired
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: START file:///Z:/task_1594412983/build/tests/reftest/tests/layout/reftests/position-sticky/block-in-inline-continuations-ref.html
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
[task 2020-07-10T21:47:50.743Z] 21:47:50     INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
[task 2020-07-10T21:47:50.744Z] 21:47:50     INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
[task 2020-07-10T21:47:50.744Z] 21:47:50     INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
[task 2020-07-10T21:47:50.744Z] 21:47:50     INFO - REFTEST INFO | Saved log: RecordResult fired
[task 2020-07-10T21:47:50.744Z] 21:47:50     INFO - REFTEST TEST-END | layout/reftests/position-sticky/block-in-inline-continuations.html == layout/reftests/position-sticky/block-in-inline-continuations-ref.html

Comment 2

[Intermittent Failures Robot]

12 failures in 5265 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 11
• mozilla-central: 1

Platform breakdown:

• windows7-32-shippable: 5
• macosx1014-64-shippable-qr: 1
• linux1804-64-shippable: 2
• linux1804-64-shippable-qr: 3
• macosx1014-64-shippable: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1652186&startday=2020-07-06&endday=2020-07-12&tree=all

Comment 3

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Can you check what started this last Friday? First failure is this one.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

Do you have a pushlog or something I could look at? Off-hand nothing sticky related has landed recently...

Comment 5

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Did some retriggers and first failure has moved but wasn't frequent enough to identify a regressor.

Comment 6

[Intermittent Failures Robot]

43 failures in 4014 pushes (0.011 failures/push) were associated with this bug in the last 7 days.

This is the #22 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 35
• mozilla-central: 7
• try: 1

Platform breakdown:

• macosx1014-64-shippable-qr: 1
• windows10-64-shippable-qr: 2
• linux1804-64-shippable: 10
• macosx1014-64-shippable: 4
• linux1804-64-shippable-qr: 5
• windows10-aarch64: 1
• windows7-32-shippable: 18
• linux1804-64-qr: 1
• linux1804-64: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1652186&startday=2020-07-13&endday=2020-07-19&tree=all

Comment 7

[Atila Butkovits]

This bug failed 51 times in the past 7 days. This happens on: windows7-32-shippable, macosx1014-64-shippable-qr, macosx1014-64-shippable, linux1804-64-shippable-qr, linux1804-64-shippable, linux1804-64-qr opt and windows10-64 asan.

Recent failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=311076002&repo=mozilla-central&lineNumber=13157
Sean, could you assign someone to take a look?

Comment 8

[Intermittent Failures Robot]

53 failures in 4310 pushes (0.012 failures/push) were associated with this bug in the last 7 days.

This is the #19 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 39
• mozilla-central: 14

Platform breakdown:

• windows7-32-shippable: 11
• linux1804-64-qr: 2
• linux1804-64-shippable: 10
• linux1804-64-shippable-qr: 10
• windows10-64: 1
• macosx1014-64-shippable-qr: 7
• macosx1014-64-shippable: 8
• linux1804-64: 2
• windows7-32: 1
• windows10-64-shippable-qr: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1652186&startday=2020-07-20&endday=2020-07-26&tree=all

Comment 9

[Sean Voisen (:svoisen)]

Not sure we'd have anything regressing position:sticky recently, but TYLin maybe you can poke at this a little when you have a chance?

Comment 10

[Intermittent Failures Robot]

42 failures in 4289 pushes (0.01 failures/push) were associated with this bug in the last 7 days.

This is the #26 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• try: 1
• autoland: 33
• mozilla-central: 8

Platform breakdown:

• linux1804-64: 11
• windows7-32-shippable: 5
• linux1804-64-shippable: 6
• macosx1014-64-shippable: 3
• windows10-aarch64: 1
• macosx1014-64: 4
• android-hw-p2-8-0-android-aarch64-qr: 1
• macosx1014-64-qr: 3
• linux1804-64-qr: 7
• windows7-32: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1652186&startday=2020-07-27&endday=2020-08-02&tree=all

Comment 11

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

The intermittent reftest block-in-inline-continuations.html uses an <iframe>, so I'd guess that we probably take the reftest snapshot before the iframe completely loaded for flushed.

Take this log for example, the snapshot in the iframe is blank.
https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/cdEcAQBaT8ubEisCB72xzA/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

I may try to use reftest-wait on <html>, and remove it after the iframe is completely painted after adjusting its width.

Emilio, do you by any chance know how to detect when the iframe is completely painted?

Comment 12

[Emilio Cobos Álvarez (:emilio)]

Emilio, do you by any chance know how to detect when the iframe is completely painted?

I don't think you can do that. The reftest harness is supposed to take care of that, afaict.

Comment 13

[Timothy Nikkel (:tnikkel)]

The reftest harness doesn't do anything until the load event of the top level document fires, and that should only fire after the iframe is loaded.

It then does a setTimeout(setTimeout()) for it's next step so that it happens after any load event handlers run in the document

https://searchfox.org/mozilla-central/rev/b4f3ce16c5099cf068fb023341959a0457adec9e/layout/tools/reftest/reftest-content.js#1154

AfterOnloadScripts then flushes layout

https://searchfox.org/mozilla-central/rev/b4f3ce16c5099cf068fb023341959a0457adec9e/layout/tools/reftest/reftest-content.js#1103

The SendInitCanvasWithSnapshot call that happens after that should call SynchronizeForSnapshot which synchronously flushes the layertree to the parent. And then finally it tells the parent to take a snapsnot.

I'm sure there are a lot of reftests in the tree that have an iframe that make some sort of change in an onload handler just like this test. So if that mechanism was broken in general I would expect many more intermittent failures to be cropping up.

Comment 14

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

Thanks for the explanation of the screenshot mechanism of the reftests!

As for the actual action to address intermittent, I take a look at bug 980247 where the test was added. Now block-in-inline-continuations.html cannot reproduce the bug with the fix reverted. So the test doesn't seem so useful today...

I think the intent of the test is to trigger an incremental reflow of the scroll container by adjusting the width of the parent, so maybe we don't need to embed the actual test in the iframe. I think adjusting the width of the scroll container should be sufficient to trigger an incremental reflow. That may make the test more stable.

Comment 15

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

Attachment: Bug 1652186 - Expand the content in <iframe> into block-in-inline-continuations.html.

Comment 16

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c58fba8602d1
Expand the content in <iframe> into block-in-inline-continuations.html. r=emilio

Comment 17

[Cristina Coroiu [:ccoroiu]]

https://hg.mozilla.org/mozilla-central/rev/c58fba8602d1

Comment 18

[Intermittent Failures Robot]

36 failures in 4618 pushes (0.008 failures/push) were associated with this bug in the last 7 days.

This is the #33 most frequent failure this week.

** This failure happened more than 30 times this week! Resolving this bug is a high priority. **

** Try to resolve this bug as soon as possible. If unresolved for 2 weeks, the affected test(s) may be disabled. **

Repository breakdown:

• autoland: 30
• mozilla-central: 5
• try: 1

Platform breakdown:

• linux1804-64-qr: 7
• linux1804-64: 18
• macosx1014-64-shippable-qr: 2
• macosx1014-64: 3
• windows7-32: 2
• windows7-32-shippable: 2
• linux1804-64-shippable-qr: 1
• macosx1014-64-qr: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1652186&startday=2020-08-03&endday=2020-08-09&tree=all