Tests that DFG respects neutered typed arrays.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS array.length is 100
PASS array[0] is 42
PASS foo(array) is 100
PASS bar(array) is 42
PASS array.length is 0
PASS array[0] is undefined
PASS foo(array) is 0
PASS bar(array) is undefined
PASS successfullyParsed is true
TEST COMPLETE
