File: verifier-no-nested-suspend.sil

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// RUN: not --crash %target-sil-opt %s 2>&1 | %FileCheck %s
// REQUIRES: asserts

// CHECK: cannot suspend async task while unawaited continuation is active

sil_stage raw

import Builtin
import Swift
import SwiftShims
import _Concurrency

// hello(_:)
sil hidden [ossa] @$s4main5helloyS2bYaF : $@convention(thin) @async (Bool) -> Bool {
bb0(%0 : $Bool):
  debug_value %0 : $Bool, let, name "b", argno 1
  %2 = enum $Optional<Builtin.Executor>, #Optional.none!enumelt
  %22 = alloc_stack $Bool
  %27 = get_async_continuation_addr Bool, %22 : $*Bool
  hop_to_executor %2 : $Optional<Builtin.Executor> // <- the bad nested suspension
  await_async_continuation %27 : $Builtin.RawUnsafeContinuation, resume bb1

bb1:
  dealloc_stack %22 : $*Bool
  return %0 : $Bool
}