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If a type has unsafe fields, its safety invariants are not simply the conjunction of its field types' safety invariants. Consequently, it's invalid to reason about the safety properties of these types in a purely structural manner — i.e., the manner in which `auto` traits are implemented. Makes progress towards #132922.
48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
error[E0133]: initializing type with an unsafe field is unsafe and requires unsafe block
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--> $DIR/unsafe-fields-crate.rs:9:5
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LL | / WithUnsafeField {
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LL | |
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LL | | unsafe_field: 0,
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LL | | safe_field: 0,
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LL | | }
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| |_____^ initialization of struct with unsafe field
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= note: unsafe fields may carry library invariants
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error[E0133]: use of unsafe field is unsafe and requires unsafe block
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--> $DIR/unsafe-fields-crate.rs:43:5
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LL | s.unsafe_field = 2;
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| ^^^^^^^^^^^^^^ use of unsafe field
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= note: unsafe fields may carry library invariants
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error[E0133]: use of unsafe field is unsafe and requires unsafe block
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--> $DIR/unsafe-fields-crate.rs:48:5
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LL | s.unsafe_field
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| ^^^^^^^^^^^^^^ use of unsafe field
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= note: unsafe fields may carry library invariants
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error[E0133]: use of unsafe field is unsafe and requires unsafe block
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--> $DIR/unsafe-fields-crate.rs:53:6
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LL | &s.unsafe_field
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| ^^^^^^^^^^^^^^ use of unsafe field
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= note: unsafe fields may carry library invariants
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error[E0133]: use of unsafe field is unsafe and requires unsafe block
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--> $DIR/unsafe-fields-crate.rs:58:39
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LL | let WithUnsafeField { safe_field, unsafe_field } = s;
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| ^^^^^^^^^^^^ use of unsafe field
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= note: unsafe fields may carry library invariants
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error: aborting due to 5 previous errors
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For more information about this error, try `rustc --explain E0133`.
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