305789 2026-01-19 12:52:08 -0800 Error.captureStackTrace() is not working 2026-01-28 10:32:22 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build PC Linux RESOLVED FIXED InRadar P2 Normal --- 1 alexschwartz01 syg keith_miller syg webkit-bug-importer oldest_to_newest 2173096 0 alexschwartz01 2026-01-19 12:52:08 -0800 ```js function wrapper(x) { if (x === 5) { const e = new Error Error.captureStackTrace(e, wrapper) throw e } return 7 } Promise.try(() => { const x = wrapper(5) }).catch(err => { console.log(err.stack) }) ``` --- # Chromium Output Error at <anonymous>:11:15 at Promise.try (<anonymous>) at <anonymous>:10:12 # Chromium Output without Error.captureStackTrace() Error at wrapper (<anonymous>:3:19) at <anonymous>:11:15 at Promise.try (<anonymous>) at <anonymous>:10:12 --- # Firefox Output @debugger eval code:11:22 @debugger eval code:10:9 # Firefox Output without Error.captureStackTrace() wrapper@debugger eval code:3:19 @debugger eval code:11:22 @debugger eval code:10:9 --- # Webkit Output wrapper@ @ try@[native code] global code@ # Webkit Output without Error.captureStackTrace() wrapper@ @ try@[native code] global code@ 2173097 1 alexschwartz01 2026-01-19 12:54:29 -0800 I would expect the "Webkit Output" section (where Error.captureStackTrace() is used) to be smaller than the "Webkit Output without Error.captureStackTrace()" section 2173098 2 alexschwartz01 2026-01-19 12:55:38 -0800 I used Epiphany Technology Preview 2173712 3 alexschwartz01 2026-01-21 10:17:08 -0800 original PR for this feature: https://github.com/WebKit/WebKit/pull/16790 2175231 4 webkit-bug-importer 2026-01-26 12:53:12 -0800 <rdar://problem/168941975> 2175660 5 syg 2026-01-27 20:32:20 -0800 Pull request: https://github.com/WebKit/WebKit/pull/57384 2175840 6 ews-feeder 2026-01-28 09:52:12 -0800 Committed 306356@main (0e62abf49f09): <https://commits.webkit.org/306356@main> Reviewed commits have been landed. Closing PR #57384 and removing active labels. 2175868 7 alexschwartz01 2026-01-28 10:32:22 -0800 Can confirm this fixes my issue Thank you!