28 lines
574 B
Rust
28 lines
574 B
Rust
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// Ensure that *any* assignment to the return place of a value with interior mutability
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// disqualifies it from promotion.
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#![feature(const_if_match)]
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use std::cell::Cell;
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const X: Option<Cell<i32>> = {
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let mut x = None;
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if false {
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x = Some(Cell::new(4));
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}
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x
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};
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const Y: Option<Cell<i32>> = {
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let mut y = Some(Cell::new(4));
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if true {
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y = None;
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}
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y
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};
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fn main() {
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let x: &'static _ = &X; //~ ERROR temporary value dropped while borrowed
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let y: &'static _ = &Y; //~ ERROR temporary value dropped while borrowed
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}
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