[Webkit-unassigned] [Bug 237180] REGRESSION (iOS 15.4 beta): Unity WASM builds fail to load

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=237180

--- Comment #10 from Brendan Duncan <brendanduncan at gmail.com> ---
Here's another datapoint indicating the problem is coming from WASM execution rather than Angle/WebGL. I used my tool that does a playback recording of all the WebGL commands executed by Unity to render a frame. It saves all the commands into an html that can be opened to recreate the frame render in pure Javascript.

The javascript version renders in both Safari Tech Preview 15.4 and iOS 15.4 beta, but the WASM version does not. There are a bunch of WebGL errors in WebKit that do not occur in Chrome, but they don't affect the render.

This indicates to me the WASM execution is causing the problems that cause the memory corruption / stack errors on iOS, and the black screen on STP.

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