Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 96ec73a1e57d67618055237272f866849103669c
https://github.com/WebKit/WebKit/commit/96ec73a1e57d67618055237272f866849103669c
Author: Ryosuke Niwa <[email protected]>
Date: 2026-06-05 (Fri, 05 Jun 2026)
Changed paths:
A LayoutTests/streams/readable-stream-fake-promise-crash-expected.txt
A LayoutTests/streams/readable-stream-fake-promise-crash.html
M Source/WebCore/Modules/streams/StreamPipeToUtilities.cpp
Log Message:
-----------
Type confusion in ReadableStream when cancel returns a fake Promise object
https://bugs.webkit.org/show_bug.cgi?id=312357
rdar://174652787
Reviewed by Chris Dumez.
Use jsDynamicCast in place of jsCast to avoid type confusion.
Test: streams/readable-stream-fake-promise-crash.html
* LayoutTests/streams/readable-stream-fake-promise-crash-expected.txt: Added.
* LayoutTests/streams/readable-stream-fake-promise-crash.html: Added.
* Source/WebCore/Modules/streams/StreamPipeToUtilities.cpp:
(WebCore::cancelReadableStream):
(WebCore::StreamPipeToState::globalObject):
(WebCore::StreamPipeToState::errorsMustBePropagatedForward):
(WebCore::StreamPipeToState::closingMustBePropagatedBackward):
Originally-landed-as: 305413.674@safari-7624-branch (86716cafbc99).
rdar://176058606
Canonical link: https://commits.webkit.org/314690@main
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