async_for_each_back_deploy.swift

// RUN: %target-swift-frontend -strict-concurrency=complete -dump-ast %s | %FileCheck %s
// REQUIRES: concurrency, OS=macosx

@available(SwiftStdlib 5.1,*)
func f<S:AsyncSequence>(s:S)asyncthrows{
 // CHECK-NOT: next(isolation:)
 // CHECK: next()
fortryawaitxin s {}
}