New tests and bugs

[andrei.eremeev]

Hi REPL team,

Please, find new tests here: 
http://cr.openjdk.java.net/~aeremeev/forward_reference.00/

Found bugs: calling of unresolved method causes creation of temporary 
variable
-> int f() { return x; }
|  Declared method f, however, it cannot be invoked until variable x is 
declared

-> f()
|  Attempted to call f which cannot be invoked until variable x is declared.

-> /vars
|    int $1 = 0

Class redeclaration changes behavior of assign variable:
   assertDeclare("class A { public String toString() { return \"old\"; } 
}", Declared);
   assertDeclare("A a = new A();", Declared);
   assertExecute1("a;", "old");
   assertDeclare("class A { public String toString() { return \"new\"; } 
}", Replaced);
   assertExecute1("a;", "old"); <-- Expected old, but found null.


Andrei Eremeev