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rust/tests/ui/mir/enum/negative_discr_break.rs

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//@ run-fail
//@ compile-flags: -C debug-assertions
//@ error-pattern: trying to construct an enum from an invalid value 0xfd
#[allow(dead_code)]
enum Foo {
A = -2,
B = -1,
C = 1,
}
fn main() {
let _val: Foo = unsafe { std::mem::transmute::<i8, Foo>(-3) };
}