Brackets becomes unresponsive when scrolling brackets.min.css

[marcelgerber]

1. In the Brackets repo, run grunt build to generate a new src/styles/brackets.min.css (I created mine based on a5a2cd5)
2. Ensure View > Word Wrap is enabled
3. Open the aforementioned file in Brackets
4. Scroll all the way to the end

Result:
Sooner or later, Brackets freezes with the renderer process (not the main process) utilizing around 17-20% of CPU usage.

Windows 8.1, Brackets 1.2 Shell (official), a5a2cd5.
I reproduced this with a vanilla version of Brackets, without any extensions and with all preferences set to their default (aka first launch).

[marcelgerber]

It's literally an issue with f3644f7. (I git bisected 3 times to find that, and double-checked the actual culprit, so yeah, it is).

[le717]

If this is confirmed to be caused by that commit, I think you just won the weirdest bug origin award.

[marcelgerber]

There are others that qualify, like brackets-userland/brackets-git#436, but thanks :D

I guess there's something wrong with the way CM measures fonts, and then it's not too obscure.

[marcelgerber]

Interesting. Looking further into this issue, it does not repro when I disable the QuickView default extension.