blob: 1547a6ca73a04d2094887791976e6b70fde12503 (
plain)
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
|
error: Undefined Behavior: write access through <TAG> at ALLOC[0x0] is forbidden
--> tests/fail/both_borrows/illegal_write6.rs:LL:CC
|
LL | unsafe { *y = 2 };
| ^^^^^^ Undefined Behavior occurred here
|
= help: this indicates a potential bug in the program: it performed an invalid operation, but the Tree Borrows rules it violated are still experimental
= help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/tree-borrows.md for further information
= help: the accessed tag <TAG> is foreign to the protected tag <TAG> (i.e., it is not a child)
= help: this foreign write access would cause the protected tag <TAG> (currently Unique) to become Disabled
= help: protected tags must never be Disabled
help: the accessed tag <TAG> was created here
--> tests/fail/both_borrows/illegal_write6.rs:LL:CC
|
LL | let x = &mut 0u32;
| ^^^^^^^^^
help: the protected tag <TAG> was created here, in the initial state Reserved
--> tests/fail/both_borrows/illegal_write6.rs:LL:CC
|
LL | fn foo(a: &mut u32, y: *mut u32) -> u32 {
| ^
help: the protected tag <TAG> later transitioned to Unique due to a child write access at offsets [0x0..0x4]
--> tests/fail/both_borrows/illegal_write6.rs:LL:CC
|
LL | *a = 1;
| ^^^^^^
= help: this transition corresponds to the first write to a 2-phase borrowed mutable reference
= note: BACKTRACE (of the first span):
= note: inside `foo` at tests/fail/both_borrows/illegal_write6.rs:LL:CC
note: inside `main`
--> tests/fail/both_borrows/illegal_write6.rs:LL:CC
|
LL | foo(x, p);
| ^^^^^^^^^
note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
error: aborting due to 1 previous error
|
