Can't see full list of components in `Components` tab after 4.0.0

[EWhite613]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Components'
2. Click on 'Do a small search'
3. Notice Components list is some broken state and can't see any components past a certain point where it broke
4. See cannot read .key of null traces down to https://github.com/glimmerjs/glimmer-vm/blob/858de79dbc4d5858365ccfcfce33e57407da81d1/packages/%40glimmer/reference/lib/iterable.ts#L294

Expected behavior
Should see the full list

Screenshots
This line will repeatedly error out https://github.com/glimmerjs/glimmer-vm/blob/858de79dbc4d5858365ccfcfce33e57407da81d1/packages/%40glimmer/reference/lib/iterable.ts#L294 . If I find a small enough list I won't see this error
Environment
Chrome 81.0.4044.138
Ember 3.16.5
Additional context
Wish I could debug more, putting conditional breakpoints on the source never gets resolved even though it's evident from the error it should

[mattmarcum]

👍 I think I'm seeing this bug too, but just on the components tab in general. Trying on ember-observer.com and the list renders correctly the first time but scrolling in the list causes rendering issues where most of the components don't show up.

Env:
Firefox 77.0b4
AND
Chrome 81.0

[RobbieTheWagner]

@chancancode did I imagine it or did I see something about this being a bug with the keys and vertical collection in Ember 3.17 and updating to 3.18 fixed it?

[chancancode]

Yes we fixed it on master but haven’t released yet. I can do it after landing @SYU15’s other PR. In the mean time, try the nightly channel since the release will take a few days to get approved: https://chrome.google.com/webstore/detail/ibdbkmdgflhglikhjdbogjjflkialpfi

[chancancode]

Duplicate of #1195
Fixed by #1196

Pending release in stable channel

[mtrunt]

@chancancode I'm currently using the nightly extension (v4.1.0) and I'm still seeing the bug.

Only the components in the initial viewport and a few on the edges (outside viewport) seem to show properly the first time the Components tab is selected; however once you start scrolling no new components appear and when you scroll back up some of the previous shown components disappear.

[chancancode]

I noticed this after I posted the comment, but unfortunately even the nightly channel is currently quite behind due to long review queues (probably COVID-19 related). The current approves version of nightly is from May 1.

You can instead go here and download the build manually. Find the artifacts drop down and click chrome.zip. Unzip it into a folder. Go to chrome://extensions, disable the ember inspector you have now and click “Load unpacked...” and select the folder you unzipped.

[chancancode]

@mtrunt @mattmarcum @EWhite613 4.1.0 has been published on the chrome store, which should fix the issue. If it doesn't, feel free to comment here and I can reopen the issue.