FLDelayedSerializationMock DNU when Serializing

[seandenigris]

The following script:

FLSerializer new
        object: 1;
        fileName: (FileLocator home / '1.fuel') fullName;
        serialize.

led to this error:

Implementing this on FLDelayedSerializationMock avoided the error, but not sure of other implications:

isResponsible
    ^ false

Fuel 4.0.0 on P9 (GT actually)

[theseion]

How did you load the project? That method is simply a method on FLDelayedSerializationModk, which is in Fuel-Test-Core. Your example works for me.

[seandenigris]

I loaded it in an image where 3.0.3 was already loaded. Could that be a factor? I’ll try a fresh image

[theseion]

The baseline includes a hack that first unloads a loaded Fuel. I know that works because we run all our tests in Pharo by simply loading the baseline. The only difference I can see so far is GT.

[seandenigris]

Yes, I confirm. I get the error in GT, but not P9. Not sure what the difference is. Checking the references of BaselineOfFuel in GT, there is:

"BaselineOfIDE"
        spec baseline: 'Fuel' with: [ 
            spec
                repository: repository;
                loads: #( 'Tests' ) ].

and

"BaselineOfMorphic"
        spec baseline: 'Fuel' with: [ 
            spec repository: repository; loads: #('Core') ].

which are the same in Pharo 9. Although, maybe the value of repository is different? Perhaps @girba could shed some light...

[theseion]

Do you load GT into the image manually or do you use a prepared image? Can you post the instructions for either so I can try to reproduce?

[seandenigris]

Metacello new
    repository: 'github://theseion/Fuel:4.0.0';
    baseline: 'Fuel';
    load.

[theseion]

The reason this loads differently in GT is that GT explicitly loads #Tests. Metacello will detect a load conflict and will not load the new version. In Pharo that package is probably not registered (my guess is that the release process cleans out the Metacello registry), so it looks like #Tests is something new to load.

In any case, here's the invocation to make it work in GT:

Metacello new
    repository: 'github://theseion/Fuel:4.0.0';
    baseline: 'Fuel';
    onWarning: [ :ex |
        ex class == MCMergeOrLoadWarning
            ifTrue: [ ex load ]
            ifFalse: [ ex resume ] ];
    load: #Tests

[seandenigris]

Thanks. I requested on discord for GT to upgrade to 4.0.0 which seems to be the simplest fix