[Webkit-unassigned] [Bug 242912] New: REGRESSION (iOS 16 beta) WASM crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242912

            Bug ID: 242912
           Summary: REGRESSION (iOS 16 beta) WASM crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: WebAssembly
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: brendanduncan at gmail.com

Created attachment 461016

  --> https://bugs.webkit.org/attachment.cgi?id=461016&action=review

Unity project build triggering WASM crash on iOS 16

Testing Unity WebGL builds on iOS 16 beta, all projects above a certain WASM size crash on load. I can make a small project that runs correctly, and add a small amount to the project to trigger the crash. So it does not appear to be WebGL / ANGLE related, but specifically WASM related. It resembles the WASM crash from 15.4 (https://bugs.webkit.org/show_bug.cgi?id=237180), but it's not the same since the work-arounds we used for that issue did not work here.

This is a critical ship-stopper issue for Unity, we do not want to be in the situation we were in with iOS 15.4 shipping with the critical failure.

I attached a minimal Unity project build that triggers the crash.

I tested MacOS Safari Tech Preview 16 and it does not have the crash, so it seems specific to iOS Webkit.

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