Bug 300942

Summary:

WasmGC crash with Flutter Web app

Product:

WebKit

Reporter:

kevmoo

Component:

WebAssembly

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Major

Priority:

Version:

Safari 18

Hardware:

Mac (Apple Silicon)

OS:

macOS 15

See Also:

https://bugs.webkit.org/show_bug.cgi?id=295799

Attachments:

Description	Flags
Displaying crash message in Safari	none

kevmoo

Reported 2025-10-16 16:23:18 PDT

Created attachment 477106 [details] Displaying crash message in Safari See https://bouncing.web.app Often getting `RuntimeError: ref.cast failed to cast reference to target heap type` which does not happen on Firefox or Chrome latest. I also occasionally get a full crash of the tab, but this seems to be happening less often.

Attachments
Displaying crash message in Safari (52.34 KB, image/png) 2025-10-16 16:23 PDT, kevmoo	no flags	Details
View All Add attachment proposed patch, testcase, etc.

kevmoo

Comment 1 2025-10-16 16:32:16 PDT

Looks like my TL beat me to it – 3 months ago - https://bugs.webkit.org/show_bug.cgi?id=295799 I think we can close this as duplicate. Sorry!

Alexey Proskuryakov

Comment 2 2025-10-17 08:46:55 PDT

Thank you for the update! *** This bug has been marked as a duplicate of bug 295799 ***

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