When creats fsc an init@ variable?

Question

If I deserialize from XML I get the following error:The initialization of an object or value resulted in an object or value being accessed recursively before it was fully initialized.

My F# code looks as following:

[<...>]
[<...>]
[<DataContract>]
type DerivedClass() as X = class
    inherit BaseClass()
    [<DataMember>]
    [<Input>]
    [<DefaultValue>]
    val mutable MemberName: myType  
    ....

I used ILSpy to look at the result and getting the init@117 value that guards against Access before initilazation.

...       
[..., DataContract]
[System.Serializable]
public class DerivedClass : BaseClass
{
[..., DefaultValue, DataMember]
public modulName.myType  MemberName;

internal int init@117;
    ...

All my other classes don't get an init@ variable and deserialize as expected. Why is the init@ sometimes created and sometimes not? The answer could help me to fix my code.

Edit

The number after the @ stands for the sourc code line of the type.

Edit 2

Referencing the type with as creates the HasSelfReferentialConstructor reponsible for the InstanceMembersNeedSafeInitCheck so changing

...
type DerivedClass() as X = class
...

to

...
type DerivedClass()  = class
...

solved the issue for me.

Answer 1

Referencing the type with as creates the HasSelfReferentialConstructorreponsible for theInstanceMembersNeedSafeInitCheck so changing

...
type DerivedClass() as X = class
...

to

...
type DerivedClass()  = class
...

solved the issue for me.