Bug 212483

Summary:	REGRESSION: (r261940): [ iPadOS wk2 ] fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html is failing consistently.
Product:	WebKit	Reporter:	Jason Lawrence <Lawrence.j>
Component:	Text	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	mmaxfield, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	iPhone / iPad
OS:	iOS 13

Description Jason Lawrence 2020-05-28 13:11:23 PDT

fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html

Description:
This test is failing consistently on iPadOS wk2 Debug. The test appears to have regressed with the introduction of the changes in r261940.

History:
https://results.webkit.org/?suite=layout-tests&test=fast%2Ftext-autosizing%2Fios%2Fidempotentmode%2Fidempotent-autosizing-after-changing-initial-scale.html&platform=ios&model=iPad%20(5th%20generation)&limit=50000

Diff:
--- /Volumes/Data/slave/ipados-simulator-13-release-tests-wk2/build/layout-test-results/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale-expected.txt
+++ /Volumes/Data/slave/ipados-simulator-13-release-tests-wk2/build/layout-test-results/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale-actual.txt
@@ -8,17 +8,17 @@
 
 After changing initial scale to 0.5
 none	auto
-8px	13px
-12px	17px
-14px	19px
-16px	19px
+8px	8px
+12px	12px
+14px	14px
+16px	16px
 20px	20px
 
 After changing initial scale to 0.75
 none	auto
-8px	10px
-12px	14px
-14px	16px
+8px	8px
+12px	12px
+14px	14px
 16px	16px
 20px	20px

Comment 1 Radar WebKit Bug Importer 2020-05-28 13:11:46 PDT

<rdar://problem/63729887>

Comment 2 Jason Lawrence 2020-05-28 13:31:06 PDT

I am able to reproduce the failures with r261940, but cannot reproduce the issue with r261939 using the following command (adjusting the checkout to match the commit):
--ipad-simulator --debug --iterations 99 --exit-after-n-failures 3 -f fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html


r261940:
[3/99] fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html failed unexpectedly (text diff)
[4/99] fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html failed unexpectedly (text diff)
[5/99] fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-after-changing-initial-scale.html failed unexpectedly (text diff)
Exiting early after 3 failures. 3 tests run.

r261939:
All 99 tests ran as expected.

Comment 3 Jason Lawrence 2020-05-28 13:40:57 PDT

I have marked this test as failing while this issue is investigated.
https://trac.webkit.org/changeset/262256/webkit

Comment 4 Alexey Proskuryakov 2020-06-01 17:47:29 PDT

Looks like Myles filed a new bug to fix this.

*** This bug has been marked as a duplicate of bug 212564 ***