Bug 214877

Summary:	REGRESSION (r262539): [ iOS wk2 ] imported/w3c/web-platform-tests/html/canvas/element/imagebitmap/createImageBitmap-drawImage.html is a flaky failure
Product:	WebKit	Reporter:	Karl Rackler <rackler>
Component:	New Bugs	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	ryanhaddad, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Karl Rackler 2020-07-28 08:56:32 PDT

Description:
imported/w3c/web-platform-tests/html/canvas/element/imagebitmap/createImageBitmap-drawImage.html

This test was modified in the  WPT resync in https://trac.webkit.org/changeset/262539/webkit, so that probably introduced the flakiness.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fcanvas%2Felement%2Fimagebitmap%2FcreateImageBitmap-drawImage.html&platform=ios&flavor=wk2&limit=50000

Diff:
--- /Volumes/Data/slave/ipados-simulator-13-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/canvas/element/imagebitmap/createImageBitmap-drawImage-expected.txt
+++ /Volumes/Data/slave/ipados-simulator-13-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/html/canvas/element/imagebitmap/createImageBitmap-drawImage-actual.txt
@@ -1,3 +1,53 @@
+      4          272
+000000FA:  0202  4          4         1141
+0000000A:  0100  4          4          300
+00000016:  0101  4          4          150
+00000022:  0102  3          6          110
+0000002E:  011A  5          8          116
+0000003A:  011B  5          8          124
+00000046:  0128  3          2            2
+00000052:  0131  2         12          132
+0000005E:  0132  2         20          144
+000000A6:  0100  4          4          256
+000000B2:  0101  4          4          128
+000000BE:  0102  3          6          266
+000000CA:  0103  3          2            6
+000000D6:  0106  3          2            6
+000000E2:  0115  3          2            3
+000000EE:  0201  4          4          272
+000000FA:  0202  4          4         1141
+0000000A:  0100  4          4          300
+00000016:  0101  4          4          150
+00000022:  0102  3          6          110
+0000002E:  011A  5          8          116
+0000003A:  011B  5          8          124
+00000046:  0128  3          2            2
+00000052:  0131  2         12          132
+0000005E:  0132  2         20          144
+000000A6:  0100  4          4          256
+000000B2:  0101  4          4          128
+000000BE:  0102  3          6          266
+000000CA:  0103  3          2            6
+000000D6:  0106  3          2            6
+000000E2:  0115  3          2            3
+000000EE:  0201  4          4          272
+000000FA:  0202  4          4         1141
+0000000A:  0100  4          4          300
+00000016:  0101  4          4          150
+00000022:  0102  3          6          110
+0000002E:  011A  5          8          116
+0000003A:  011B  5          8          124
+00000046:  0128  3          2            2
+00000052:  0131  2         12          132
+0000005E:  0132  2         20          144
+000000A6:  0100  4          4          256
+000000B2:  0101  4          4          128
+000000BE:  0102  3          6          266
+000000CA:  0103  3          2            6
+000000D6:  0106  3          2            6
+000000E2:  0115  3          2            3
+000000EE:  0201  4          4          272
+000000FA:  0202  4          4         1141
 
 PASS createImageBitmap from an HTMLCanvasElement, and drawImage on the created ImageBitmap 
 PASS createImageBitmap from an HTMLCanvasElement scaled down, and drawImage on the created ImageBitmap

Comment 1 Radar WebKit Bug Importer 2020-07-28 08:57:04 PDT

<rdar://problem/66220084>

Comment 2 Karl Rackler 2020-07-28 09:03:29 PDT

I have marked these tests as failing while this issue is investigated.
https://trac.webkit.org/changeset/264987/webkit

Comment 3 Alexey Proskuryakov 2021-08-17 11:44:59 PDT

This test is passing 100% now, and has been for a long time.