2063067a81
As of commit 7767cbb3b0,
the tests/ui/consts/const-eval/ub-int-array.rs test is
failing on big-endian platforms (in particular s390x),
as the stderr output contains a hex dump that depends
on endianness.
Since this point intentionally verifies the hex dump to
check the uninitialized byte markers, I think we should
not simply standardize away the hex dump as is done with
some of the other tests in this directory.
However, most of the test is already endian-independent.
The only exception is one line of hex dump, which can
also be made endian-independent by choosing appropriate
constants in the source code.
Since the 32bit and 64bit stderr outputs were already
(and remain) identical, I've merged them and removed
the stderr-per-bitwidth marker.
Fixes (again) https://github.com/rust-lang/rust/issues/105383.
66 lines
1.7 KiB
Rust
66 lines
1.7 KiB
Rust
//! 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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impl<T: Copy> MaybeUninit<T> {
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const fn new(t: T) -> Self {
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MaybeUninit { init: t }
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}
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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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//~| invalid value at [0]
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mem::transmute([
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MaybeUninit { uninit: () },
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// Constants chosen to achieve endianness-independent hex dump.
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MaybeUninit::new(0x11111111),
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MaybeUninit::new(0x22222222),
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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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//~| invalid value at [1]
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mem::transmute([
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(1u8),
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MaybeUninit { uninit: () },
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MaybeUninit::new(1u8),
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MaybeUninit::new(1u8),
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MaybeUninit::new(2u8),
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MaybeUninit::new(2u8),
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MaybeUninit { uninit: () },
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MaybeUninit::new(2u8),
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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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//~| invalid value at [2]
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mem::transmute([
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(0u8),
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MaybeUninit::new(1u8),
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MaybeUninit::new(1u8),
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MaybeUninit::new(1u8),
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MaybeUninit::new(1u8),
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MaybeUninit::new(2u8),
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MaybeUninit::new(2u8),
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MaybeUninit::new(2u8),
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MaybeUninit { uninit: () },
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])
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};
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fn main() {}
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