mirror of https://github.com/rust-lang/rust
42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
// Strip out raw byte dumps to make comparison platform-independent:
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//@ normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
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//@ normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
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#![feature(core_intrinsics)]
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#![feature(never_type)]
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use std::intrinsics;
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use std::mem;
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#[derive(Copy, Clone)]
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enum Bar {}
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#[repr(C)]
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union MaybeUninit<T: Copy> {
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uninit: (),
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init: T,
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}
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const BAD_BAD_BAD: Bar = unsafe { MaybeUninit { uninit: () }.init };
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//~^ ERROR evaluation of constant value failed
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//~| constructing invalid value
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const BAD_BAD_REF: &Bar = unsafe { mem::transmute(1usize) };
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//~^ ERROR it is undefined behavior to use this value
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//~| constructing invalid value
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const BAD_BAD_ARRAY: [Bar; 1] = unsafe { MaybeUninit { uninit: () }.init };
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//~^ ERROR evaluation of constant value failed
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//~| constructing invalid value
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const READ_NEVER: () = unsafe {
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let mem = [0u32; 8];
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let ptr = mem.as_ptr().cast::<!>();
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let _val = intrinsics::read_via_copy(ptr);
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//~^ ERROR evaluation of constant value failed
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//~| constructing invalid value
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};
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fn main() {}
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