Bug 305789 – Error.captureStackTrace() is not working

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Alex Schwartz]

```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@

[Alex Schwartz]

I would expect the "Webkit Output" section
    (where Error.captureStackTrace() is used)
to be smaller than the "Webkit Output without Error.captureStackTrace()" section

[Alex Schwartz]

I used Epiphany Technology Preview

[Alex Schwartz]

original PR for this feature: https://github.com/WebKit/WebKit/pull/16790

[Radar WebKit Bug Importer]

<rdar://problem/168941975>

[Shu-yu Guo]

Pull request: https://github.com/WebKit/WebKit/pull/57384

[EWS]

Committed 306356@main (0e62abf49f09): <https://commits.webkit.org/306356@main>

Reviewed commits have been landed. Closing PR #57384 and removing active labels.

[Alex Schwartz]

Can confirm this fixes my issue 
Thank you!