nl_tokens: LeakError copied from https : // github . com / substack / node - syntax - error
pl_tokens: function LeakError ( opts , src , file ) { Error . call ( this ) ; this . message = 'global leak detected: ' + opts . variable ; this . <mask> = opts . line - 1 ; this . column = opts . column ; this . annotated = '\n' + ( file || '(anonymous file)' ) + ':' + this . line + '\n' + src . split ( '\n' ) [ this . line ] + '\n' + Array ( this . column + 1 ) . join ( ' ' ) + '^' + '\n' + 'LeakError: ' + this . message ; }