Bug 210046 – storage/indexeddb/value-cursor-cycle.html is flaky failing because it incorrectly thinks our JS GC is precise.

• Status: NEW
• Component: Media

[Jason Lawrence]

storage/indexeddb/value-cursor-cycle.html

Description:
This test is flaky failing on Mac Release. The flaky failures appear to have started on 04/05/2020.

History:
https://results.webkit.org/?suite=layout-tests&test=storage%2Findexeddb%2Fvalue-cursor-cycle.html&platform=mac&limit=50000&style=release

Diff: 
--- /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/storage/indexeddb/value-cursor-cycle-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk2/build/layout-test-results/storage/indexeddb/value-cursor-cycle-actual.txt
@@ -32,9 +32,10 @@
 PASS cursorObservation.wasCollected is false
 value = null
 gc()
-PASS cursorObservation.wasCollected is true
-PASS valueObservation.wasCollected is true
+FAIL cursorObservation.wasCollected should be true. Was false.
+FAIL valueObservation.wasCollected should be true. Was false.
 PASS successfullyParsed is true
+Some tests failed.
 
 TEST COMPLETE

[Radar WebKit Bug Importer]

<rdar://problem/61342245>

[Jason Lawrence]

I can reproduce this issue on r259554, but I cannot reproduce the issue with r259553.

r259554:
run-webkit-tests --iterations 999 --exit-after-n-failures 3 -f storage/indexeddb/value-cursor-cycle.html
[21/999] storage/indexeddb/value-cursor-cycle.html failed unexpectedly (text diff)
[21/999] storage/indexeddb/value-cursor-cycle.html failed unexpectedly (text diff)
[21/999] storage/indexeddb/value-cursor-cycle.html failed unexpectedly (text diff)
Exiting early after 3 failures. 20 tests run.
17 tests ran as expected, 3 didn't (979 didn't run):


r259553:
run-webkit-tests --iterations 999 --exit-after-n-failures 3 -f storage/indexeddb/value-cursor-cycle.html
All 999 tests ran as expected.

[Jason Lawrence]

I have marked this test as failing while this issue is investigated. 
https://trac.webkit.org/changeset/259596/webkit

[Ryan Haddad]

Marked test as flaky for iOS in https://trac.webkit.org/changeset/260868/webkit