|  | error[E0381]: used binding `i` is possibly-uninitialized | 
|  | --> $DIR/borrowck-or-init.rs:5:20 | 
|  | | | 
|  | LL |     let i: isize; | 
|  | |         - binding declared here but left uninitialized | 
|  | LL | | 
|  | LL |     println!("{}", false || { i = 5; true }); | 
|  | |                               ----- binding initialized here in some conditions | 
|  | LL |     println!("{}", i); | 
|  | |                    ^ `i` used here but it is possibly-uninitialized | 
|  | | | 
|  | = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info) | 
|  |  | 
|  | error: aborting due to 1 previous error | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0381`. |