| // RUN: %target-swift-frontend -emit-sil -verify %s | %FileCheck %s | |
| class S {} | |
| let arr: [(S, Int)] = [] | |
| let _: [S] = arr.sorted { | |
| $0.1 < $1.1 | |
| // CHECK: function_ref @$sSlsE6prefixy11SubSequenceQzSiF : $@convention(method) <τ_0_0 where τ_0_0 : Collection> (Int, @in_guaranteed τ_0_0) -> @out τ_0_0.SubSequence | |
| }.prefix(1).map { | |
| return $0.0 | |
| } |