File: async-boxed-arg.swift

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// RUN: %target-swift-frontend %s -emit-ir -g -o - -parse-as-library \
// RUN:    -module-name M  -disable-availability-checking | %FileCheck %s
// REQUIRES: concurrency

@available(SwiftStdlib 5.1, *)
extension Collection where Element: Sendable {
  public func f() async throws {
    return try await withThrowingTaskGroup(of: Element.self) { group in
      var i = self.startIndex
      func doit() async throws {
        group.spawn { [i] in
          return self[i]
        }
      }
      try await doit()
    }
  }
}

// CHECK: ![[BOXTY:[0-9]+]] = !DICompositeType(tag: DW_TAG_structure_type, name: "$s5IndexSlQzz_x_SlRzs8Sendable7ElementSTRpzlXXD"
// CHECK: !DILocalVariable(name: "i", arg: 3, {{.*}}type: ![[BOXTY]]