[Webkit-unassigned] [Bug 220364] New: Should SharedArrayBuffer/WebAssembly.Memory really throw?

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220364

            Bug ID: 220364
           Summary: Should SharedArrayBuffer/WebAssembly.Memory really
                    throw?
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: WPTImpact
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gsnedders at apple.com
                CC: ysuzuki at apple.com

Currently in ToT (and STP 117+), trying to create a SharedArrayBuffer throws with "Shared WebAssembly.Memory and SharedArrayBuffer are not enabled".

This has caused a variety of WPT tests to regress (e.g., many encoding tests), due to https://github.com/web-platform-tests/wpt/blob/master/common/sab.js silently creating a non-shared WebAssembly.Memory (as would be expected of an unsupported option) previously but now throwing with that TypeError.

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