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31 lines
701 B
Rust
31 lines
701 B
Rust
//@ known-bug: #107975
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//@ compile-flags: -Copt-level=2
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//@ run-pass
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// Derived from https://github.com/rust-lang/rust/issues/107975#issuecomment-1431758601
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use std::ptr;
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fn main() {
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let a: usize = {
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let v = 0u8;
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ptr::from_ref(&v).addr()
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};
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let b: usize = {
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let v = 0u8;
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ptr::from_ref(&v).addr()
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};
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// So, are `a` and `b` equal?
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// Let's check their difference.
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let i: usize = a - b;
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// It's not zero, which means `a` and `b` are not equal.
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assert_ne!(i, 0);
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// But it looks like zero...
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assert_eq!(format!("{i}"), "0");
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// ...and now it *is* zero?
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assert_eq!(i, 0);
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// So `a` and `b` are equal after all?
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}
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