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add const eval bool-to-int cast test

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This commit is contained in:
Ralf Jung 2024-06-11 13:28:36 +02:00
parent db44cae343
commit de4ac0c465
2 changed files with 31 additions and 0 deletions
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11
tests/ui/consts/const-eval/ub-invalid-values.rs Normal file
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const fn bool_cast(ptr: *const bool) { unsafe {
let _val = *ptr as u32; //~ERROR: evaluation of constant value failed
//~^ interpreting an invalid 8-bit value as a bool
}}
const _: () = {
let v = 3_u8;
bool_cast(&v as *const u8 as *const bool);
};
fn main() {}

20
tests/ui/consts/const-eval/ub-invalid-values.stderr Normal file
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error[E0080]: evaluation of constant value failed
--> $DIR/ub-invalid-values.rs:2:16
|
LL | let _val = *ptr as u32;
| ^^^^^^^^^^^ interpreting an invalid 8-bit value as a bool: 0x03
|
note: inside `bool_cast`
--> $DIR/ub-invalid-values.rs:2:16
|
LL | let _val = *ptr as u32;
| ^^^^^^^^^^^
note: inside `_`
--> $DIR/ub-invalid-values.rs:8:5
|
LL | bool_cast(&v as *const u8 as *const bool);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0080`.