I had the same problem today, on Windows in my case. I guess you use a custom theme for your UI? Because that's what triggered the bug for me.
If our problem is the same, then check your user-specific settings (Preferences -> Settings - User). Weird things have happened to "ignored_packages", every custom package I had installed was listed there all of a sudden. Including the UI themes. That's why all these artifacts suddenly appeared. Deleting these entries solved the problem instantly.
I suspect that the Package Control update is the culprit. ST worked until I'd seen the update message, then crashed. The UI was a mess from there on out.