2021-01-24 21:38:10 -06:00
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//@ ignore-32bit
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// This test gives a different error on 32-bit architectures.
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2021-03-31 03:09:16 -05:00
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//@ stderr-per-bitwidth
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2021-01-24 21:38:10 -06:00
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2021-01-10 21:55:54 -06:00
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union Transmute<T: Copy, U: Copy> {
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t: T,
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u: U,
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}
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trait Bar {
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fn bar(&self) -> u32;
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}
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struct Foo {
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foo: u32,
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bar: bool,
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}
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impl Bar for Foo {
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fn bar(&self) -> u32 {
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self.foo
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}
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}
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#[derive(Copy, Clone)]
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struct Fat<'a>(&'a Foo, &'static VTable);
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struct VTable {
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size: Foo,
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}
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const FOO: &dyn Bar = &Foo {
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foo: 128,
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bar: false,
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};
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const G: Fat = unsafe { Transmute { t: FOO }.u };
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//~^ ERROR it is undefined behavior to use this value
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fn main() {}
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