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robustBufferAccess

A GPU safety feature that makes out-of-bounds buffer reads/writes in a shader return harmless results instead of crashing.

Shaders sometimes index past the end of a buffer. Without protection this is undefined behavior that can crash or corrupt memory. When robustBufferAccess is enabled, the Vulkan implementation guarantees such accesses are bounded — reads return zero or clamped values, writes are discarded — so a buggy shader degrades gracefully rather than taking down the system.