301710 2025-10-30 13:04:07 -0700 Temporal: Adding large microseconds or nanoseconds values can yield wrong results 2025-11-04 20:50:15 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 301904 1 tjc tjc commit-queue webkit-bug-importer oldest_to_newest 2155302 0 tjc 2025-10-30 13:04:07 -0700 ``` const pdt = Temporal.PlainDateTime.from("2020-02-29T00:57:27.747612578"); pdt.add(Temporal.Duration.from({microseconds: Number.MAX_SAFE_INTEGER}).toString() ``` Should be: ``` "2305-08-04T00:45:02.488603578" ``` Actual result in JSC: ``` "2305-08-04T00:45:02.488604578" ``` 2155306 1 tjc 2025-10-30 13:09:55 -0700 Pull request: https://github.com/WebKit/WebKit/pull/53211 2156113 2 ews-feeder 2025-11-03 18:07:17 -0800 Committed 302509@main (ce3c6e45d71d): <https://commits.webkit.org/302509@main> Reviewed commits have been landed. Closing PR #53211 and removing active labels. 2156115 3 webkit-bug-importer 2025-11-03 18:08:12 -0800 <rdar://problem/163977265> 2156143 4 commit-queue 2025-11-03 19:40:24 -0800 Re-opened since this is blocked by bug 301904 2156369 5 tjc 2025-11-04 12:00:54 -0800 Pull request: https://github.com/WebKit/WebKit/pull/53413 2156493 6 ews-feeder 2025-11-04 20:50:13 -0800 Committed 302573@main (db7f4c5396b8): <https://commits.webkit.org/302573@main> Reviewed commits have been landed. Closing PR #53413 and removing active labels.