[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 #14 from Brendan Duncan <brendanduncan at gmail.com> ---
Here is some more information about this crash. With iOS 15.4 Release Candidate still being broken, this means all Unity web builds will be broken on iOS when 15.4 ships.

The crash seems to be related to the size of the WASM file. It seems WASM files > ~9MB crash, while WASM files < 9MB work.

I attached two builds of the same Unity project, which does nothing but set the clear color of the canvas. 

unity_ios15_4_working.zip has a build where the WASM file size is 6.2MB.
unity_ios_15_4_crash.zip is the same project, but built in development mode, and the WASM file size is 9.1MB. 

I did another test where I built the project with different compiler settings that resulted in a 8.4MB WASM, which still worked.

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