[Webkit-unassigned] [Bug 245145] REGRESSION (iOS 16): Sequences of strokes in canvas may stroke with incorrect styles

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=245145

Chris Campbell <ccampbell at climateinteractive.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ccampbell at climateinteractiv
                   |                            |e.org

--- Comment #4 from Chris Campbell <ccampbell at climateinteractive.org> ---
I believe this bug report accurately describes the graph rendering issues we're seeing in the En-ROADS climate simulator:
https://en-roads.climateinteractive.org/scenario.html

The issue causes lines to appear with the wrong color (e.g., the "Baseline" plot should always be black, not gray) and/or with the wrong stroke width (hovering over the "Current Scenario" blue plot sometimes causes it to appear thin instead of thick).

These issues were not present in Safari 15 or any other browser.  Only reproducible in Safari 16.0, Safari 16.1 beta1, and latest Safari Technology Preview (Release 153).

FWIW, we use Chart.js (https://github.com/chartjs/Chart.js) v2.9.4 for rendering graphs in En-ROADS.  While I don't have a smaller test case that reproduces this outside of En-ROADS/Chart.js, I hope you'll use En-ROADS to verify the fix for this regression.

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