Python Error Not Covered By Parser: (AttributeError: 'Parser' object has no attribute 'returned')

[Tater-Bot]

A Python error occurred when running this Tanzine: https://discordapp.com/channels/731302554784235520/732672699297562814/760555324771008573

Tanzine Code:

@FUNC@ <fetchJSON> [@url] {
  @VAR@ request = @RUN@ (requests/get,@url)
  @VAR@ son = @RUN@ (@request.json)
  @RUN@ (/print, @son)
  @RETURN@ None
}

@VAR@ response = @RUN@ (<fetchJSON>,"http://crows.sh:9000/cosmosis/getChain")

@RUN@ (/print,@response)```

Python Error:

Traceback (most recent call last):
  File "/root/tanzine-bot/tokens.py", line 421, in Parse
    x = exec(statment)
  File "<string>", line 1
    print( @son)
           ^
SyntaxError: invalid syntax

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "run.py", line 10, in <module>
    parser.Parse()
  File "/root/tanzine-bot/tokens.py", line 362, in Parse
    self.run_functions(func, args)
  File "/root/tanzine-bot/tokens.py", line 457, in run_functions
    self.Parse()
  File "/root/tanzine-bot/tokens.py", line 424, in Parse
    if self.returned:
AttributeError: 'Parser' object has no attribute 'returned'