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#[derive(Default)] struct TwoFiftySix { _a: [u64; 32] } #[derive(Default)] struct EightK { _a: [TwoFiftySix; 32] } #[derive(Default)] struct TwoFiftySixK { _a: [EightK; 32] } #[derive(Default)] struct EightM { _a: [TwoFiftySixK; 32] } pub fn main() { // Normally this blows up because we can't reserve size on stack // for the `EightM` struct. But because the compiler notices we // never do anything with `_x`, it optimizes out the stack storage // and the program completes successfully. let _x = EightM::default(); }
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