293319 2025-05-20 14:36:57 -0700 AbortController.signal.reason is lost after garbage collection 2025-06-02 08:50:40 -0700 1 1 1 Unclassified WebKit DOM Safari Technology Preview All All RESOLVED FIXED InRadar P2 Normal --- 1 pfg youennf cdumez rniwa webkit-bug-importer youennf oldest_to_newest 2118505 0 pfg 2025-05-20 14:36:57 -0700 Reproduction: Run the code in Safari, and Collect garbage before the setTimeout resolves (() => { const controller = new AbortController(); controller.abort(new Error("should print this")); // Press 'collect garbage' before this setTimeout resolves setTimeout(() => { console.log(controller.signal.reason); }, 1000); })() Actual results: 'undefined' is printed after one second Expected results: The error "should print this" should be printed after one second Build date and hardware: Safari Technology Preview Release 219 (Safari 18.4, WebKit 20622.1.12) on M3 Max macOS 15.3 (24D60) 2119948 1 webkit-bug-importer 2025-05-27 14:37:29 -0700 <rdar://problem/152111446> 2120089 2 youennf 2025-05-28 01:42:20 -0700 Pull request: https://github.com/WebKit/WebKit/pull/45986 2121124 3 ews-feeder 2025-06-02 08:50:37 -0700 Committed 295688@main (f1292b56a628): <https://commits.webkit.org/295688@main> Reviewed commits have been landed. Closing PR #45986 and removing active labels.