Re: threads:on + gc:orc = C(!) compiler errors in unit tests

[ZadaZorg]

Running your example gives me nice working results: 
    
    
    [OK] foo
    
    Run

But I also have strange suggestion like you: 
    
    
    Hint: passing 'n[i].key' to a sink parameter introduces an implicit copy; 
if possible, rearrange your program's control flow to prevent it [Performance]
    
    Run

I'm using nim 1.2.4 via choosenim in windows wsl (o_O) with ubuntu 20.04