|  | error[E0133]: use of mutable static is unsafe and requires unsafe function or block | 
|  | --> $DIR/safe-extern-statics-mut.rs:11:13 | 
|  | | | 
|  | 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:12:15 | 
|  | | | 
|  | 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:13:14 | 
|  | | | 
|  | 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:14:16 | 
|  | | | 
|  | 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`. |