Empty sequence of specific type given problems when compiling with "cpp"

[drkameleon]

I have this line of code:
    
    
    var ret = DICT(cast[Context](@[]))
    
    
    Run

DICT takes Context as a param. And a Context is nothing but a seq[(int,int)].

Obviously, an empty sequence can be anything, so I cast it to Context.

Now, the thing is: when I compile it with "c", everything goes smooth; when I 
compile it with "cpp" (clang++ on macOS), I have the following error:
    
    
    error: assigning to 'TGenericSeq *' from incompatible type 
'tySequence__77YVzYb2AOu2vP0iI0b8Dw *'
                    T11_ = (tySequence__77YVzYb2AOu2vP0iI0b8Dw*)0;
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    
    Run

Any workarounds?