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Rust doesn't have invisible allocations. The compiler doesn't even know what an allocation is.

• mcguire 6y ago
  "So if the Rust compiler causes hidden allocations that cannot be caught and returned as errors, then I seriously think that this whole approach needs to be entirely NAK'ed, and the Rust infrastructure - whether at the compiler level or in the kernel wrappers - needs more work." So Linus is worried about nothing?
  • paavohtl 6y ago
    Yes, basically. The Rust standard library has data structures and functions which require memory allocation, and _will_ panic on allocation failure. But the allocating subset of the standard library is a separate module, which is usually turned off in embedded or kernel-level code. The current prototype uses it to speed up development, but the long term plan as far as I understand is to replace it or augment the current implementation to support fallible allocation (which is being worked on anyway).