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<script>
function main() {
  debugger;
  foo();
}
function foo() {
  let x;
  let y = 3;
  return 0;
}
</script>
<script>
function main() {
  debugger;
  foo();
}
function foo() {
  let x;
  let y = 3;
  return 0;
}
</script>