[$] The edge-triggered misunderstanding

The Android 12 beta release first appeared in May of this year. As is almost obligatory, this release features "the biggest design change in Android's history"; what's an Android release without requiring users to relearn everything? That historical event was not meant to include one change that many beta testers are noticing, though: a kernel regression that breaks a significant number of apps. This problem has just been fixed, but it makes a good example of why preventing regressions can be so hard and how the kernel project responds to them when they do happen.