Odd Segfault when using dynlib

[jrfondren]

abbreviated `--expandArc` output:
    
    
    let cards = cast[CardsProc](checkedSymAddr(lib, "load"))
        echo [
          :tmpD_1 = `$`(
            :tmpD = cards()
            :tmpD)
          :tmpD_1]
        unloadLib(lib)
        echo ["Lib unloaded"]
      finally:
        `=destroy`(:tmpD_1)
        `=destroy_1`(:tmpD)
    
    
    Run

That `:tmpD = cards()` return is getting destroyed after the library is 
unloaded. Is that safe to do?