scraping getStackTrace () but should use what getStrackTrace uses.

cgenTrace.nim

proc cgenTrace (skip:int = 0, drop:int = 16):string =
  var a = ""
  var b = getStackTrace ()
  while a != b:
    a = b
    b = replace (a, "  ", " ")
  let c = split (a, "\n")
  let e = c.len-(3+skip)
  let g = 1+drop;
  if (e < 1) or (g > e):
    return ""
  else:
    var f = c [g..e]
    reverse (f)
    return "\t/* " & f.join ("; ") & "*/"