Bug 179176 – REGRESSION: LayoutTest svg/wicd/test-rightsizing-a.xhtml is a flaky failure

• Component: New Bugs
• Status: NEW

[Ryan Haddad]

LayoutTest svg/wicd/test-rightsizing-a.xhtml is a flaky failure

https://build.webkit.org/results/Apple%20Sierra%20Release%20WK2%20(Tests)/r224154%20(5349)/results.html

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=svg%2Fwicd%2Ftest-rightsizing-a.xhtml

--- /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/svg/wicd/test-rightsizing-a-expected.txt
+++ /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/svg/wicd/test-rightsizing-a-actual.txt
@@ -40,14 +40,14 @@
           RenderBR {br} at (0,0) size 0x17
         RenderBlock {div} at (0,328) size 176x63 [bgcolor=#FF0000]
           RenderEmbeddedObject {object} at (0,0) size 176x62
-            layer at (0,0) size 176x62
-              RenderView at (0,0) size 176x62
-            layer at (0,0) size 176x62
-              RenderSVGRoot {svg} at (0,0) size 176x62
-                RenderSVGRect {rect} at (0,0) size 176x62 [fill={[type=SOLID] [color=#CCCCCC]}] [x=0.00] [y=0.00] [width=176.00] [height=62.00]
-                RenderSVGRect {rect} at (2,2) size 174x60 [fill={[type=SOLID] [color=#333333]}] [x=2.00] [y=2.00] [width=174.00] [height=60.00]
-                RenderSVGRect {rect} at (2,2) size 172x58 [fill={[type=SOLID] [color=#FFFFFF]}] [x=2.00] [y=2.00] [width=172.00] [height=58.00]
-                RenderSVGRect {rect} at (86,2) size 88x58 [fill={[type=SOLID] [color=#FFCC33]}] [x=86.00] [y=2.00] [width=88.00] [height=58.00]
+            layer at (0,0) size 300x62
+              RenderView at (0,0) size 300x62
+            layer at (0,0) size 300x62
+              RenderSVGRoot {svg} at (62,0) size 176x62
+                RenderSVGRect {rect} at (62,0) size 176x62 [fill={[type=SOLID] [color=#CCCCCC]}] [x=0.00] [y=0.00] [width=176.00] [height=62.00]
+                RenderSVGRect {rect} at (64,2) size 174x60 [fill={[type=SOLID] [color=#333333]}] [x=2.00] [y=2.00] [width=174.00] [height=60.00]
+                RenderSVGRect {rect} at (64,2) size 172x58 [fill={[type=SOLID] [color=#FFFFFF]}] [x=2.00] [y=2.00] [width=172.00] [height=58.00]
+                RenderSVGRect {rect} at (148,2) size 88x58 [fill={[type=SOLID] [color=#FFCC33]}] [x=86.00] [y=2.00] [width=88.00] [height=58.00]
                 RenderSVGText {text} at (45,10) size 82x46 contains 1 chunk(s)
                   RenderSVGInlineText {#text} at (0,0) size 81x46
                     chunk 1 (middle anchor) text run 1 at (45.99,46.00) startOffset 0 endOffset 3 width 80.02: "SVG"

[Ryan Haddad]

We need to find the regression point for this, it started a few days ago on macOS / iOS WK2.

[Matt Lewis]

I was able to reproduce the issue and narrow down the revision that cause the change using:
run-webkit-tests --no-retry-failures --verbose svg/wicd/test-rightsizing-a.xhtml --iterations=100 -f -g

The revision is:
https://trac.webkit.org/changeset/224150/webkit

[Matt Lewis]

Temporarily marked as flaky:
https://trac.webkit.org/changeset/224940/webkit

[Matt Lewis]

Fixed the test expectations with https://trac.webkit.org/changeset/225190/webkit

[Alicia Boya García]

This bug reproduces in GTK, moving to general expectations...

[Radar WebKit Bug Importer]

<rdar://problem/42793010>