pub fn foo() {
    { 'fl: for _ in 0..10 { break; } }   //~ NOTE first declared here
    { 'fl: loop { break; } }             //~ WARN label name `'fl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'fl already in scope
    { 'lf: loop { break; } }             //~ NOTE first declared here
    { 'lf: for _ in 0..10 { break; } }   //~ WARN label name `'lf` shadows a label name that is already in scope
    //~^ NOTE lifetime 'lf already in scope
    { 'wl: while 2 > 1 { break; } }      //~ NOTE first declared here
    { 'wl: loop { break; } }             //~ WARN label name `'wl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'wl already in scope
    { 'lw: loop { break; } }             //~ NOTE first declared here
    { 'lw: while 2 > 1 { break; } }      //~ WARN label name `'lw` shadows a label name that is already in scope
    //~^ NOTE lifetime 'lw already in scope
    { 'fw: for _ in 0..10 { break; } }   //~ NOTE first declared here
    { 'fw: while 2 > 1 { break; } }      //~ WARN label name `'fw` shadows a label name that is already in scope
    //~^ NOTE lifetime 'fw already in scope
    { 'wf: while 2 > 1 { break; } }      //~ NOTE first declared here
    { 'wf: for _ in 0..10 { break; } }   //~ WARN label name `'wf` shadows a label name that is already in scope
    //~^ NOTE lifetime 'wf already in scope
    { 'tl: while let Some(_) = None::<i32> { break; } } //~ NOTE first declared here
    { 'tl: loop { break; } }             //~ WARN label name `'tl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'tl already in scope
    { 'lt: loop { break; } }             //~ NOTE first declared here
    { 'lt: while let Some(_) = None::<i32> { break; } }
                                         //~^ WARN label name `'lt` shadows a label name that is already in scope
                                         //~| NOTE lifetime 'lt already in scope
}
// Issue #21633: reject duplicate loop labels in function bodies.
//
// This is testing the generalization (to the whole function body)
// discussed here:
// https://internals.rust-lang.org/t/psa-rejecting-duplicate-loop-labels/1833
Issue #21633: reject duplicate loop labels in function bodies.
Issue #21633 : reject duplicate loop labels in function bodies .
pub fn foo() {
    { 'fl: for _ in 0..10 { break; } }   //~ NOTE first declared here
    { 'fl: loop { break; } }             //~ WARN label name `'fl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'fl already in scope
    { 'lf: loop { break; } }             //~ NOTE first declared here
    { 'lf: for _ in 0..10 { break; } }   //~ WARN label name `'lf` shadows a label name that is already in scope
    //~^ NOTE lifetime 'lf already in scope
    { 'wl: while 2 > 1 { break; } }      //~ NOTE first declared here
    { 'wl: loop { break; } }             //~ WARN label name `'wl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'wl already in scope
    { 'lw: loop { break; } }             //~ NOTE first declared here
    { 'lw: while 2 > 1 { break; } }      //~ WARN label name `'lw` shadows a label name that is already in scope
    //~^ NOTE lifetime 'lw already in scope
    { 'fw: for _ in 0..10 { break; } }   //~ NOTE first declared here
    { 'fw: while 2 > 1 { break; } }      //~ WARN label name `'fw` shadows a label name that is already in scope
    //~^ NOTE lifetime 'fw already in scope
    { 'wf: while 2 > 1 { break; } }      //~ NOTE first declared here
    { 'wf: for _ in 0..10 { break; } }   //~ WARN label name `'wf` shadows a label name that is already in scope
    //~^ NOTE lifetime 'wf already in scope
    { 'tl: while let Some(_) = None::<i32> { break; } } //~ NOTE first declared here
    { 'tl: loop { break; } }             //~ WARN label name `'tl` shadows a label name that is already in scope
    //~^ NOTE lifetime 'tl already in scope
    { 'lt: loop { break; } }             //~ NOTE first declared here
    { 'lt: while let Some(_) = None::<i32> { break; } }
                                         //~^ WARN label name `'lt` shadows a label name that is already in scope
                                         //~| NOTE lifetime 'lt already in scope
}
pub fn foo ( ) { { ' fl : for _ in 0 .. 10 { break ; } } //~ NOTE first declared here { ' fl : loop { break ; } } //~ WARN label name `'fl` shadows a label name that is already in scope //~^ NOTE lifetime 'fl already in scope { ' lf : loop { break ; } } //~ NOTE first declared here { ' lf : for _ in 0 .. 10 { break ; } } //~ WARN label name `'lf` shadows a label name that is already in scope //~^ NOTE lifetime 'lf already in scope { ' wl : while 2 > 1 { break ; } } //~ NOTE first declared here { ' wl : loop { break ; } } //~ WARN label name `'wl` shadows a label name that is already in scope //~^ NOTE lifetime 'wl already in scope { ' lw : loop { break ; } } //~ NOTE first declared here { ' lw : while 2 > 1 { break ; } } //~ WARN label name `'lw` shadows a label name that is already in scope //~^ NOTE lifetime 'lw already in scope { ' fw : for _ in 0 .. 10 { break ; } } //~ NOTE first declared here { ' fw : while 2 > 1 { break ; } } //~ WARN label name `'fw` shadows a label name that is already in scope //~^ NOTE lifetime 'fw already in scope { ' wf : while 2 > 1 { break ; } } //~ NOTE first declared here { ' wf : for _ in 0 .. 10 { break ; } } //~ WARN label name `'wf` shadows a label name that is already in scope //~^ NOTE lifetime 'wf already in scope { ' tl : while let Some ( _ ) = None :: < i32 > { break ; } } //~ NOTE first declared here { ' tl : loop { break ; } } //~ WARN label name `'tl` shadows a label name that is already in scope //~^ NOTE lifetime 'tl already in scope { ' lt : loop { break ; } } //~ NOTE first declared here { ' lt : while let Some ( _ ) = None :: < i32 > { break ; } } //~^ WARN label name `'lt` shadows a label name that is already in scope //~| NOTE lifetime 'lt already in scope }
Issue #21633: reject duplicate loop labels in function bodies.
Issue #21633 : reject duplicate loop labels in function bodies .