f# - Fsi fails to augment a type constructor - bug or feature? -


let's take type augmentation abusive f# script below:

type augmentme = val _i : int type augmentme member i.i = i._i type augmentme new(i) = { _i = } printfn "augmentme instance: %i" (augmentme(42).i)

that, when being interpreted whole, yields expected fsi output:

>  augmentme instance: 42  type augmentme =   class     new : i:int -> augmentme     val _i: int     member : int   end val : unit = ()

now, if reset fsi session , interpret same script, time line-by-line, fsi fails add type constructor following diagnostics last 2 script lines:

>  type augmentme =   class     val _i: int   end >  type augmentme   member : int >   ~vs7894.fsx(3,30): warning fs0073: internal error: pop on empty stack during code generation, methodname = augmentme..ctor, m = c:\users\gene\appdata\local\temp\~vs7894.fsx(3,29)-(3,39)  type augmentme   new : i:int -> augmentme >   ~vs7894.fsx(4,35): error fs0039: value or constructor 'augmentme' not defined

after googling following mentioning circa 2011 has popped up, apparently artifact still has place.

what gives? should report fsbugs? thank you.


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