Chrome toolbar icon progress bar stuck indefinitely at 100%

[Tomalak]

In Chrome, the toolbar icon does not hide the green progress bar after running internal DB updates, it's just sitting indefinitely at 100%:

Only after clicking on the icon (disable/enable), the progress bar disappears:

[birtles]

Yes, I've definitely seen this on Edge before. I tried to debug it last week but couldn't reproduce it.

If it happens again, would you be able to hover over the icon and tell me what it says?

I'm trying to determine if it's a problem with the final update not occurring or if it's a race condition involving loading the icons. I suspect it's the latter.

[Tomalak]

It does not say anything special.

[birtles]

Thanks that's very helpful.

I think that eliminates the possibility that the final database update is not being received. Instead, my guess is that in Chromium-based browsers, setIcon is not guaranteed to be FIFO. That is, my current theory is we have the following situation:

1. We get a database update saying "100%"
2. We call setIcon asynchronously to load and set the 100% icon
3. While setIcon is still running we get another database update saying "All done"
4. We call setIcon asynchronously to load and the set done icon
5. Because the done icon has already been used (it's the default icon) it loads from the cache and is displayed
6. The first call to setIcon finally completes and overrides the second call, displaying the 100% icon