//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK):

public struct Visibility
{
  internal int x = 1;
  public int y = 5;
  // compiler synthesizes:
  // public __init(int y = 0);
}

void test()
{
    //CHECK: error 39999: too many arguments to call (got 2, expected 1)
    Visibility t1 = {1, 2};
}