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dd436ae2a6
We don't need `NonNull::as_ptr` debuginfo In order to stop pessimizing the use of local variables in core, skip debug info for MIR temporaries in tiny (single-BB) functions. For functions as simple as this -- `Pin::new`, etc -- nobody every actually wants debuginfo for them in the first place. They're more like intrinsics than real functions, and stepping over them is good.