301717 2025-10-30 15:00:04 -0700 Temporal: toString() returns wrong results for certain Instants with negative microseconds/nanoseconds 2025-11-02 15:50:12 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 tjc tjc webkit-bug-importer oldest_to_newest 2155350 0 tjc 2025-10-30 15:00:04 -0700 The following: ``` (new Temporal.Instant(-1000000000000001000n)).toString() ``` prints ``` "1938-04-24T22:13:20.999999Z" ``` The result should be: ``` 1938-04-24T22:13:19.999Z ``` 2155359 1 tjc 2025-10-30 15:06:08 -0700 Correction: the result should be: ``` '1938-04-24T22:13:19.999999Z' ``` 2155360 2 tjc 2025-10-30 15:10:17 -0700 Pull request: https://github.com/WebKit/WebKit/pull/53223 2155852 3 ews-feeder 2025-11-02 15:49:36 -0800 Committed 302460@main (6294e8df2ea0): <https://commits.webkit.org/302460@main> Reviewed commits have been landed. Closing PR #53223 and removing active labels. 2155853 4 webkit-bug-importer 2025-11-02 15:50:12 -0800 <rdar://problem/163901281>