1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
//@ normalize-stderr: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
//@ normalize-stderr: "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
#![allow(static_mut_refs)]
fn invalid() {
static S: i8 = 10;
const C: &bool = unsafe { std::mem::transmute(&S) };
//~^ERROR: undefined behavior
//~| expected a boolean
// This must be rejected here (or earlier), since it's not a valid `&bool`.
match &true {
C => {} // ok, `const` already emitted an error
_ => {}
}
}
fn extern_() {
extern "C" {
static S: i8;
}
const C: &i8 = unsafe { &S };
//~^ERROR: undefined behavior
//~| `extern` static
// This must be rejected here (or earlier), since the pattern cannot be read.
match &0 {
C => {} // ok, `const` already emitted an error
_ => {}
}
}
fn mutable() {
static mut S_MUT: i32 = 0;
const C: &i32 = unsafe { &S_MUT };
//~^ERROR: undefined behavior
//~| encountered reference to mutable memory
// This *must not build*, the constant we are matching against
// could change its value!
match &42 {
C => {} // ok, `const` already emitted an error
_ => {}
}
}
fn main() {}
|
