Halving the Crash Rate of the Airbnb App
summary
A native Skia crash on Android 8.1 and 9.0 causes 46% of Airbnb app crashes by double-destroying a shader when two cleaners run for the same native pointer. Reproduced with a small multithreaded test app (reflection + concurrent Canvas.draw using the same Paint), traced to non-thread-safe Shader.getNativeInstance and a static shared Paint used in a Glide transformation. Fix: make the Paint instance per transform, which reproduces locally and reduces crashes to near zero in released builds, proving the root cause and solution.
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