Parsing bug with comma after typed arg

[andychu]

I accidentally used , instead of ; here

$ proc buggy (; a, b) { pp line (a), pp line (b) }    # why does this parse

$ buggy (42, 43)                                                                                                                                                                                                                                                                                
(Int)   43

This is messed up

$ bin/ysh -n -c 'pp line (a), pp line (b)'
(command.Simple
  blame_tok: <pp>
  more_env: []
  words: [{<pp>} {<line>} {<Id.Lit_Comma ",">} {<pp>} {<line>}]
  redirects: []
  typed_args: 
    (ArgList
      left: <Id.Op_LParen _>
      pos_args: [(expr.Var name:<Id.Expr_Name b>)]
      named_args: []
      right: <Id.Op_RParen _>
    )
  do_fork: T
)

[andychu]

Released - https://www.oilshell.org/blog/2024/06/release-0.22.0.html