function 
    /usr/local/lib/janet/jpm/cgen.janet  on  line  25 , column  1 
    (mangle  token )
    Convert  any  sequence  of  bytes  to  a  valid  C  identifier  in  a  way  that  
    is  unlikely  to  collide.  `print-ir`  will  not  mangle  symbols  for  you.