mirror of https://github.com/rust-lang/rust
23 lines
426 B
Rust
23 lines
426 B
Rust
#![feature(core_intrinsics, rustc_attrs)]
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use std::intrinsics::rustc_peek;
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#[rustc_mir(rustc_peek_liveness, stop_after_dataflow)]
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fn foo() -> Option<i32> {
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let mut x = None;
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// `x` is live here since it is used in the next statement...
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rustc_peek(x);
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dbg!(x);
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// But not here, since it is overwritten below
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rustc_peek(x); //~ ERROR rustc_peek: bit not set
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x = Some(4);
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x
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}
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fn main() {}
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