warning: borrow of packed field is unsafe and requires unsafe function or block (error E0133) --> $DIR/issue-53114-safety-checks.rs:23:13 | LL | let _ = &p.b; | ^^^^ | = note: `#[warn(safe_packed_borrows)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #46043 = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:26:13 | LL | let _ = &u2.a; | ^^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior warning: borrow of packed field is unsafe and requires unsafe function or block (error E0133) --> $DIR/issue-53114-safety-checks.rs:29:17 | LL | let (_,) = (&p.b,); | ^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #46043 = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:31:17 | LL | let (_,) = (u1.a,); | ^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:32:17 | LL | let (_,) = (&u2.a,); | ^^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior warning: borrow of packed field is unsafe and requires unsafe function or block (error E0133) --> $DIR/issue-53114-safety-checks.rs:39:11 | LL | match &p.b { _ => { } } | ^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #46043 = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:41:11 | LL | match u1.a { _ => { } } | ^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:42:11 | LL | match &u2.a { _ => { } } | ^^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior warning: borrow of packed field is unsafe and requires unsafe function or block (error E0133) --> $DIR/issue-53114-safety-checks.rs:45:12 | LL | match (&p.b,) { (_,) => { } } | ^^^^ | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #46043 = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:47:12 | LL | match (u1.a,) { (_,) => { } } | ^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior error[E0133]: access to union field is unsafe and requires unsafe function or block --> $DIR/issue-53114-safety-checks.rs:48:12 | LL | match (&u2.a,) { (_,) => { } } | ^^^^^ access to union field | = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior error: aborting due to 7 previous errors; 4 warnings emitted For more information about this error, try `rustc --explain E0133`.