|  | error[E0133]: use of mutable static is unsafe and requires unsafe function or block | 
|  | --> $DIR/static-mut-foreign-requires-unsafe.rs:6:5 | 
|  | | | 
|  | LL |     a += 3; | 
|  | |     ^ 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/static-mut-foreign-requires-unsafe.rs:7:5 | 
|  | | | 
|  | LL |     a = 4; | 
|  | |     ^ 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/static-mut-foreign-requires-unsafe.rs:8:14 | 
|  | | | 
|  | LL |     let _b = a; | 
|  | |              ^ 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 3 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0133`. |