noreturn parameters are ignored when passed around

[ibuclaw]

Probably related to #18124

module object;

alias noreturn = typeof(*null);

ulong test1 (ref noreturn key)
{
  return hashOf (key);  // code generated is: return 0
}
ulong test2 (const ref noreturn key)
{
  return hashOf (key);  // likewise
}
ulong test3 (noreturn key)
{
  return hashOf (key);  // likewise
}

ulong hashOf (const noreturn val)
{
  assert(false);
}