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Commit | Line | Data |
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136023e0 | 1 | error[E0080]: evaluation of constant value failed |
60c5eb7d XL |
2 | --> $DIR/validate_uninhabited_zsts.rs:5:14 |
3 | | | |
4 | LL | unsafe { std::mem::transmute(()) } | |
dfeec247 XL |
5 | | ^^^^^^^^^^^^^^^^^^^^^^^ |
6 | | | | |
ba9703b0 XL |
7 | | transmuting to uninhabited type |
8 | | inside `foo` at $DIR/validate_uninhabited_zsts.rs:5:14 | |
dfeec247 | 9 | ... |
60c5eb7d | 10 | LL | const FOO: [Empty; 3] = [foo(); 3]; |
136023e0 | 11 | | ----- inside `FOO` at $DIR/validate_uninhabited_zsts.rs:14:26 |
60c5eb7d XL |
12 | |
13 | error[E0080]: it is undefined behavior to use this value | |
136023e0 | 14 | --> $DIR/validate_uninhabited_zsts.rs:17:1 |
60c5eb7d XL |
15 | | |
16 | LL | const BAR: [Empty; 3] = [unsafe { std::mem::transmute(()) }; 3]; | |
136023e0 | 17 | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed at [0]: encountered a value of uninhabited type Empty |
60c5eb7d XL |
18 | | |
19 | = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. | |
cdc7bbd5 | 20 | = note: the raw bytes of the constant (size: 0, align: 1) {} |
60c5eb7d XL |
21 | |
22 | warning: the type `!` does not permit zero-initialization | |
23 | --> $DIR/validate_uninhabited_zsts.rs:5:14 | |
24 | | | |
25 | LL | unsafe { std::mem::transmute(()) } | |
26 | | ^^^^^^^^^^^^^^^^^^^^^^^ | |
27 | | | | |
28 | | this code causes undefined behavior when executed | |
29 | | help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done | |
30 | | | |
31 | = note: `#[warn(invalid_value)]` on by default | |
dfeec247 | 32 | = note: the `!` type has no valid value |
60c5eb7d XL |
33 | |
34 | warning: the type `Empty` does not permit zero-initialization | |
136023e0 | 35 | --> $DIR/validate_uninhabited_zsts.rs:17:35 |
60c5eb7d XL |
36 | | |
37 | LL | const BAR: [Empty; 3] = [unsafe { std::mem::transmute(()) }; 3]; | |
38 | | ^^^^^^^^^^^^^^^^^^^^^^^ | |
39 | | | | |
40 | | this code causes undefined behavior when executed | |
41 | | help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done | |
42 | | | |
dfeec247 | 43 | = note: enums with no variants have no valid value |
60c5eb7d | 44 | |
136023e0 | 45 | error: aborting due to 2 previous errors; 2 warnings emitted |
60c5eb7d XL |
46 | |
47 | For more information about this error, try `rustc --explain E0080`. |