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Imported from https://youtrack.roxen.com/issue/PIKE-9

Reported by KG Sterneberg kg@roxen.com

The following code does not work (but it should):

int main(int argc, array(string) argv)
{
  Outer outer = Outer();
  Outer.Nested n = outer->get_nested();
  n->hello_world();
}

class Outer
{
  Nested get_nested()
  {
    return Nested();
  }

  class Nested
  {
    void hello_world() { werror("Hello World!\n"); }
  }
} 

Running it:

>pike tmp.pike
tmp.pike:4:Indexing on illegal type.
tmp.pike:4:Got     : zero.
tmp.pike:4:Index   : string(78..116).
tmp.pike:4:Expected constant expression.
Pike: Failed to compile script.

Moving "class Outer" above main solves the problem. However the order should not matter!