1636594 - [Fission] Firefox crashes when I try to inspect an extension in about:debugging by opening about:debugging in a non-Fission window

Status: RESOLVED DUPLICATE of bug 1637057

(Core :: DOM: Navigation, defect, P2)

Description

[Anny Gakhokidze [:annyG]]

1. Make sure you have some extensions installed (it seems to happen with any of the extensions I have but I can provide a specific one if it doesn't reproduce easily)
2. Enable fission and open a new window
3. Open a Non-Fission Window
4. In the non-Fission Window go to "about:debugging", on the left sidebar click "This Nightly" and then click on "Inspect" for any extension.

Expected: browser to not crash

Actual outcome: browser crashes :-(

This bug is for crash report bp-388cfa4b-2ad1-4244-91eb-5cb800200508.

Top 10 frames of crashing thread:

0 XUL nsWindowWatcher::OpenWindowInternal toolkit/components/windowwatcher/nsWindowWatcher.cpp:1140
1 XUL nsWindowWatcher::OpenWindow2 toolkit/components/windowwatcher/nsWindowWatcher.cpp:375
2 XUL nsGlobalWindowOuter::OpenInternal dom/base/nsGlobalWindowOuter.cpp:7191
3 XUL nsGlobalWindowOuter::OpenOuter dom/base/nsGlobalWindowOuter.cpp:5710
4 XUL nsGlobalWindowInner::Open dom/base/nsGlobalWindowInner.cpp:3748
5 XUL mozilla::dom::Window_Binding::open dom/bindings/WindowBinding.cpp:2701
6 XUL bool mozilla::dom::binding_detail::GenericMethod<mozilla::dom::binding_detail::MaybeCrossOriginObjectThisPolicy, mozilla::dom::binding_detail::ThrowExceptions> dom/bindings/BindingUtils.cpp:3203
7 XUL js::InternalCallOrConstruct js/src/vm/Interpreter.cpp:585
8 XUL Interpret js/src/vm/Interpreter.cpp:648
9 XUL js::InternalCallOrConstruct js/src/vm/Interpreter.cpp:620

Comment 1

[Anny Gakhokidze [:annyG]]

This is the crash report corresponding to the bug I ran into https://crash-stats.mozilla.org/report/index/388cfa4b-2ad1-4244-91eb-5cb800200508

Comment 2

[Chris Peterson [:cpeterson]]

Tracking for Fission Nightly M6a because this is a reproducible crash.

I assume this crash only affects Fission users, even though the STR includes debugging an extension in a non-Fission window.

Comment 3

[Nika Layzell [:nika] (ni? for response)]

I think this should've also been fixed by bug 1637057. The reproduction steps no longer work for me, so I'm going to resolve this as a dupe.

Comment 4

[Chris Peterson [:cpeterson]]

Clearing Fission Milestone for bugs resolved as duplicates. We don't need to track duplicates.