33 lines
684 B
Rust
33 lines
684 B
Rust
//@ check-pass
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// This test exhibits undefined behavior, but it is very expensive and complex to check for such
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// UB in constants.
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// Thus, we do not detect it if you create references to statics in ways that are UB.
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enum Foo {
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A = 5,
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B = 42,
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}
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enum Bar {
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C = 42,
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D = 99,
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}
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#[repr(C)]
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union Union {
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foo: &'static Foo,
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bar: &'static Bar,
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u8: &'static u8,
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}
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static BAR: u8 = 5;
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static FOO: (&Foo, &Bar) = unsafe {
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(
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// undefined behavior
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Union { u8: &BAR }.foo,
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Union { u8: &BAR }.bar,
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)
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};
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static FOO2: (&Foo, &Bar) = unsafe { (std::mem::transmute(&BAR), std::mem::transmute(&BAR)) };
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//^ undefined behavior
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fn main() {}
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