Run this: inspect(Object.defineProperty({}, Symbol(), {value: 1})) Result: ▼ {…} | Symbol(): undefined | ▶ <prototype>: Object { … } Expected: ▼ {…} | Symbol(): 1 | ▶ <prototype>: Object { … } This was regressed in https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=7bda9cc7b79882ff5986a1e6192f64fe2aca1bb5&tochange=8b0058e2a4a8a123e09470b7ee975963be88a158 because the object inspector used another request protocol for symbols, but it's a server problem (https://searchfox.org/mozilla-central/rev/0e8eb01368600eb552dd558c83c64a3b6a0b89b8/devtools/server/actors/object.js#1215)

Comment on attachment 8964181 [details] Bug 1450541 - Show values of non-enumerable symbol properties in object inspector https://reviewboard.mozilla.org/r/232928/#review238682 Nice and simple, with a test, that's perfect Oriol. Thanks a lot !

You’re welcome!

Pushed by ryanvm@gmail.com: https://hg.mozilla.org/integration/autoland/rev/efe04571107d Show values of non-enumerable symbol properties in object inspector r=nchevobbe

Is this worth backport consideration or can it ride the 61 train to release?

Comment on attachment 8964181 [details] Bug 1450541 - Show values of non-enumerable symbol properties in object inspector Approval Request Comment [Feature/Bug causing the regression]: it's noticeable since bug 1399460, but the problem existed since bug 1392614. [User impact if declined]: the console will show undefined instead of the value of non-enumerable symbol properties when inspecting an object. [Is this code covered by automated tests?]: yes [Has the fix been verified in Nightly?]: I have manually verified it in Nightly. [Needs manual test from QE? If yes, steps to reproduce]: see comment 0 [List of other uplifts needed for the feature/fix]: none [Is the change risky?]: not risky [Why is the change risky/not risky?]: trivial fix, it makes the symbol iterator stop passing onlyEnumerable=true parameter to _propertyDescriptor. Therefore non-enumerable descriptors are no longer ignored. [String changes made/needed]: none

Comment on attachment 8964181 [details] Bug 1450541 - Show values of non-enumerable symbol properties in object inspector trivial devtools console bug fix, approved for 60.0b14

Follow-up ESLint fix: https://hg.mozilla.org/releases/mozilla-beta/rev/4c070065428f

I managed to reproduce this issue on Firefox 59.0.2, under Windows 10x64. The issue is no longer reproducible on Firefox 60.0b14, or on Firefox 61.0a1 (2018-04-20). Tests were executed under Windows 10x64, Ubuntu 16.04x64, macOS 10.10.5.