error[E0133]: use of mutable static is unsafe and requires unsafe function or block --> $DIR/safe-extern-statics-mut.rs:13:13 | LL | let b = B; | ^ use of mutable static | = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior error[E0133]: use of mutable static is unsafe and requires unsafe function or block --> $DIR/safe-extern-statics-mut.rs:14:15 | LL | let rb = &B; | ^ use of mutable static | = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior error[E0133]: use of mutable static is unsafe and requires unsafe function or block --> $DIR/safe-extern-statics-mut.rs:15:14 | LL | let xb = XB; | ^^ use of mutable static | = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior error[E0133]: use of mutable static is unsafe and requires unsafe function or block --> $DIR/safe-extern-statics-mut.rs:16:16 | LL | let xrb = &XB; | ^^ use of mutable static | = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0133`.