diff options
Diffstat (limited to 'src/test/ui/consts/const-eval/ub-ref-ptr.rs')
-rw-r--r-- | src/test/ui/consts/const-eval/ub-ref-ptr.rs | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/src/test/ui/consts/const-eval/ub-ref-ptr.rs b/src/test/ui/consts/const-eval/ub-ref-ptr.rs deleted file mode 100644 index a1c812390..000000000 --- a/src/test/ui/consts/const-eval/ub-ref-ptr.rs +++ /dev/null @@ -1,60 +0,0 @@ -// ignore-tidy-linelength -// stderr-per-bitwidth -#![allow(invalid_value)] - -use std::mem; - -#[repr(C)] -union MaybeUninit<T: Copy> { - uninit: (), - init: T, -} - -const UNALIGNED: &u16 = unsafe { mem::transmute(&[0u8; 4]) }; -//~^ ERROR it is undefined behavior to use this value -//~| constructing invalid value: encountered an unaligned reference (required 2 byte alignment but found 1) - -const UNALIGNED_BOX: Box<u16> = unsafe { mem::transmute(&[0u8; 4]) }; -//~^ ERROR it is undefined behavior to use this value -//~| constructing invalid value: encountered an unaligned box (required 2 byte alignment but found 1) - -const NULL: &u16 = unsafe { mem::transmute(0usize) }; -//~^ ERROR it is undefined behavior to use this value - -const NULL_BOX: Box<u16> = unsafe { mem::transmute(0usize) }; -//~^ ERROR it is undefined behavior to use this value - - -// It is very important that we reject this: We do promote `&(4 * REF_AS_USIZE)`, -// but that would fail to compile; so we ended up breaking user code that would -// have worked fine had we not promoted. -const REF_AS_USIZE: usize = unsafe { mem::transmute(&0) }; -//~^ ERROR evaluation of constant value failed - -const REF_AS_USIZE_SLICE: &[usize] = &[unsafe { mem::transmute(&0) }]; -//~^ ERROR evaluation of constant value failed - -const REF_AS_USIZE_BOX_SLICE: Box<[usize]> = unsafe { mem::transmute::<&[usize], _>(&[mem::transmute(&0)]) }; -//~^ ERROR evaluation of constant value failed - -const USIZE_AS_REF: &'static u8 = unsafe { mem::transmute(1337usize) }; -//~^ ERROR it is undefined behavior to use this value - -const USIZE_AS_BOX: Box<u8> = unsafe { mem::transmute(1337usize) }; -//~^ ERROR it is undefined behavior to use this value - -const UNINIT_PTR: *const i32 = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR evaluation of constant value failed -//~| uninitialized - -const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; -//~^ ERROR it is undefined behavior to use this value -const UNINIT_FN_PTR: fn() = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR evaluation of constant value failed -//~| uninitialized -const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; -//~^ ERROR it is undefined behavior to use this value -const DATA_FN_PTR: fn() = unsafe { mem::transmute(&13) }; -//~^ ERROR it is undefined behavior to use this value - -fn main() {} |