RESOLVED FIXED313953
MessageChannel transfer of OffscreenCanvas and other non-IPC-serializable types fails with Site Isolation enabled 
https://bugs.webkit.org/show_bug.cgi?id=313953
Summary MessageChannel transfer of OffscreenCanvas and other non-IPC-serializable typ...
Cameron McCormack (:heycam)
Reported 2026-05-04 00:24:07 PDT
.
Attachments
Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2026-05-04 00:27:02 PDT
<rdar://problem/176161982>
Cameron McCormack (:heycam)
Comment 2 2026-05-04 00:30:39 PDT
Pull request: https://github.com/WebKit/WebKit/pull/64155
Cameron McCormack (:heycam)
Comment 3 2026-05-04 22:09:50 PDT
Anthony is fixing the same bug in https://bugs.webkit.org/show_bug.cgi?id=313692. I'll repurpose this bug to add my new tests.
EWS
Comment 4 2026-05-09 16:44:39 PDT
Committed 312959@main (0650787ae153): <https://commits.webkit.org/312959@main> Reviewed commits have been landed. Closing PR #64155 and removing active labels.
Cameron McCormack (:heycam)
Comment 5 2026-05-09 16:55:40 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/59772
Note You need to log in before you can comment on or make changes to this bug.