Instance of FakeStdinStream did not understand #stream

[hernanmd]

Trying to simulate the VM both in Pharo 11 and Pharo 12 with this script:

| options stackInterpreterSimulator |

VMStackPages  initialize.
options := {
    #ObjectMemory -> #Spur64BitCoMemoryManager.
    #BytesPerWord -> 8
} asDictionary.

stackInterpreterSimulator := StackInterpreterSimulator newWithOptions: options.
stackInterpreterSimulator openOn: Smalltalk imagePath extraMemory: 100000.
stackInterpreterSimulator run.

Produces the following exception:

A simple fix would be to answer ^ self in a new FakeStdinStream>>stream method.