65 lines
1.4 KiB
Rust
65 lines
1.4 KiB
Rust
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#![allow(const_err)] // make sure we cannot allow away the errors tested here
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//! Test the "array of int" fast path in validity checking, and in particular whether it
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//! points at the right array element.
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use std::mem;
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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 UNINIT_INT_0: [u32; 3] = unsafe {
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//~^ ERROR it is undefined behavior to use this value
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//~| type validation failed: encountered uninitialized bytes at [0]
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[
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MaybeUninit { uninit: () }.init,
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1,
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2,
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]
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};
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const UNINIT_INT_1: [u32; 3] = unsafe {
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//~^ ERROR it is undefined behavior to use this value
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//~| type validation failed: encountered uninitialized bytes at [1]
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mem::transmute(
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[
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0u8,
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0u8,
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0u8,
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0u8,
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1u8,
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MaybeUninit { uninit: () }.init,
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1u8,
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1u8,
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2u8,
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2u8,
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MaybeUninit { uninit: () }.init,
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2u8,
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]
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)
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};
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const UNINIT_INT_2: [u32; 3] = unsafe {
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//~^ ERROR it is undefined behavior to use this value
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//~| type validation failed: encountered uninitialized bytes at [2]
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mem::transmute(
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[
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0u8,
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0u8,
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0u8,
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0u8,
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1u8,
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1u8,
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1u8,
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1u8,
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2u8,
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2u8,
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2u8,
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MaybeUninit { uninit: () }.init,
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]
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)
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};
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fn main() {}
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