Constant core::arch::aarch64::_TMFAILURE_ERR

pub const _TMFAILURE_ERR: u64 = 1 << 19; // 0x0000_0000_0008_0000u64

🔬 This is a nightly-only experimental API. (stdsimd #48556)

This is supported on AArch64 only.

事务中止，因为尝试了不允许的操作