array=(a b c) ls
  ^~~~~~
"<cmd_parse_test>":1: Environment bindings can't contain array literals
..(command.CommandList
  children: [
    (command.ShAssignment
      left: <Id.Lit_VarLike "empty=">
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike "empty=">
          lhs: (sh_lhs.Name left:<Id.Lit_VarLike "empty="> name:empty)
          op: assign_op.Equal
          rhs: {(ShArrayLiteral left:<Id.Op_LParen "("> words:[] right:<Id.Right_ShArrayLiteral ")">)}
        )
      ]
    )
  ]
)(command.CommandList
  children: [
    (command.ShAssignment
      left: <Id.Lit_VarLike "array=">
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike "array=">
          lhs: (sh_lhs.Name left:<Id.Lit_VarLike "array="> name:array)
          op: assign_op.Equal
          rhs: 
            {
              (ShArrayLiteral
                left: <Id.Op_LParen "(">
                words: [{<Id.Lit_Chars a>} {<Id.Lit_Chars b>} {<Id.Lit_Chars c>}]
                right: <Id.Right_ShArrayLiteral ")">
              )
            }
        )
      ]
    )
  ]
)(command.CommandList
  children: [
    (command.Sentence
      child: 
        (command.ShAssignment
          left: <Id.Lit_VarLike "array=">
          pairs: [
            (AssignPair
              left: <Id.Lit_VarLike "array=">
              lhs: (sh_lhs.Name left:<Id.Lit_VarLike "array="> name:array)
              op: assign_op.Equal
              rhs: 
                {
                  (ShArrayLiteral
                    left: <Id.Op_LParen "(">
                    words: [{<Id.Lit_Chars a>} {<Id.Lit_Chars b>} {<Id.Lit_Chars c>}]
                    right: <Id.Right_ShArrayLiteral ")">
                  )
                }
            )
          ]
        )
      terminator: <Id.Op_Semi ";">
    )
    (command.ShAssignment
      left: <Id.Lit_VarLike "array2=">
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike "array2=">
          lhs: (sh_lhs.Name left:<Id.Lit_VarLike "array2="> name:array2)
          op: assign_op.Equal
          rhs: 
            {
              (ShArrayLiteral
                left: <Id.Op_LParen "(">
                words: [{<Id.Lit_Chars d>} {<Id.Lit_Chars e>} {<Id.Lit_Chars f>}]
                right: <Id.Right_ShArrayLiteral ")">
              )
            }
        )
      ]
    )
  ]
)(command.Simple
  blame_tok: <Id.Lit_Chars ls>
  more_env: []
  words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
  is_last_cmd: F
)(command.Pipeline
  children: [
    (command.Simple
      blame_tok: <Id.Lit_Chars ls>
      more_env: []
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
      is_last_cmd: F
    )
    (command.Simple
      blame_tok: <Id.Lit_Chars wc>
      more_env: []
      words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -l>}]
      is_last_cmd: F
    )
  ]
  ops: [<Id.Op_Pipe "|">]
)(command.AndOr
  children: [
    (command.Simple
      blame_tok: <Id.Lit_Chars ls>
      more_env: []
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
      is_last_cmd: F
    )
    (command.Simple
      blame_tok: <Id.Lit_Chars die>
      more_env: []
      words: [{<Id.Lit_Chars die>}]
      is_last_cmd: F
    )
  ]
  ops: [<Id.Op_DPipe "||">]
)(command.AndOr
  children: [
    (command.Pipeline
      children: [
        (command.Simple
          blame_tok: <Id.Lit_Chars ls>
          more_env: []
          words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
          is_last_cmd: F
        )
        (command.Simple
          blame_tok: <Id.Lit_Chars wc>
          more_env: []
          words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -l>}]
          is_last_cmd: F
        )
      ]
      ops: [<Id.Op_Pipe "|">]
    )
    (command.Simple
      blame_tok: <Id.Lit_Chars die>
      more_env: []
      words: [{<Id.Lit_Chars die>}]
      is_last_cmd: F
    )
  ]
  ops: [<Id.Op_DPipe "||">]
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars foo>})
  arms_start: <Id.KW_In in>
  arms: []
  arms_end: <Id.KW_Esac esac>
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars word>})
  arms_start: <Id.KW_In in>
  arms: [
    (CaseArm
      left: <Id.Lit_Chars foo>
      p.attern: (pat.Words words:[{<Id.Lit_Chars foo>} {<Id.Lit_Chars foo2>} {<Id.Lit_Chars foo3>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
  ]
  arms_end: <Id.KW_Esac esac>
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars word>})
  arms_start: <Id.KW_In in>
  arms: [
    (CaseArm
      left: <Id.Lit_Chars foo>
      pattern: (pat.Words words:[{<Id.Lit_Chars foo>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars one-line>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
  ]
  arms_end: <Id.KW_Esac esac>
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars word>})
  arms_start: <Id.KW_In in>
  arms: [
    (CaseArm
      left: <Id.Lit_Chars foo>
      pattern: (pat.Words words:[{<Id.Lit_Chars foo>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars foo>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
    (CaseArm
      left: <Id.Lit_Chars bar>
      pattern: (pat.Words words:[{<Id.Lit_Chars bar>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars bar>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
  ]
  arms_end: <Id.KW_Esac esac>
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars word>})
  arms_start: <Id.KW_In in>
  arms: [
    (CaseArm
      left: <Id.Lit_Chars foo>
      pattern: (pat.Words words:[{<Id.Lit_Chars foo>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars foo>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
    (CaseArm
      left: <Id.Lit_Chars bar>
      pattern: (pat.Words words:[{<Id.Lit_Chars bar>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Sentence
          child: 
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars bar>}]
              is_last_cmd: F
            )
          terminator: <Id.Op_Semi ";">
        )
      ]
    )
  ]
  arms_end: <Id.KW_Esac esac>
)(command.Case
  case_kw: <Id.KW_Case case>
  to_match: (case_arg.Word w:{<Id.Lit_Chars word>})
  arms_start: <Id.KW_In in>
  arms: [
    (CaseArm
      left: <Id.Lit_Chars foo>
      pattern: (pat.Words words:[{<Id.Lit_Chars foo>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars foo>}]
          is_last_cmd: F
        )
      ]
      right: <Id.Op_DSemi ";;">
    )
    (CaseArm
      left: <Id.Lit_Chars bar>
      pattern: (pat.Words words:[{<Id.Lit_Chars bar>}])
      middle: <Id.Right_CasePat ")">
      action: [
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars bar>}]
          is_last_cmd: F
        )
      ]
    )
  ]
  arms_end: <Id.KW_Esac esac>
)(command.Simple
  blame_tok: 
    (Token
      id: Id.Lit_Chars
      length: 2
      col: 0
      line: (SourceLine line_num:1 content:"ls foo" src:(source.MainFile path:"<test_lib>"))
    )
  more_env: []
  words: [
    (CompoundWord parts:[...0x7fedfb5933f8])
    ..(CompoundWord parts:[(Token id:Id.Lit_Chars length:3 col:3 line:...0x7fedfb5a51b0)])
  ]
  is_last_cmd: F
)
(command.ShFunction
  name_tok: 
    (Token
      id: Id.Lit_Chars
      length: 3
      col: 0
      line: 
        (SourceLine
          line_num: 1
          content: "fun() { echo hi; }"
          src: (source.MainFile path:"<test_lib>")
        )
    )
  name: fun
  body: 
    (BraceGroup
      left: (Token id:Id.Lit_LBrace length:1 col:6 line:...0x7fedfb5a5158)
      children: [
        (command.Sentence
          child: 
            (command.Simple
              blame_tok: (Token id:Id.Lit_Chars length:4 col:8 line:...0x7fedfb5a5158)
              more_env: []
              words: [
                (CompoundWord parts:[...0x7fedfb5931f0])
                (CompoundWord
                  parts: [(Token id:Id.Lit_Chars length:2 col:13 line:...0x7fedfb5a5158)]
                )
              ]
              is_last_cmd: F
            )
          terminator: (Token id:Id.Op_Semi length:1 col:15 line:...0x7fedfb5a5158)
        )
      ]
      right: (Token id:Id.Lit_RBrace length:1 col:17 line:...0x7fedfb5a5158)
    )
)
(command.Simple
  blame_tok: <Id.Lit_Chars echo>
  more_env: []
  words: [
    {<Id.Lit_Chars echo>}
    {
      (CommandSub
        left_token: <Id.Left_DollarParen "$(">
        child: 
          (command.Simple
            blame_tok: <Id.Lit_Chars echo>
            more_env: []
            words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars 12>}]
            is_last_cmd: F
          )
        right: <Id.Eof_RParen ")">
      ) 
      (CommandSub
        left_token: <Id.Left_DollarParen "$(">
        child: 
          (command.Simple
            blame_tok: <Id.Lit_Chars echo>
            more_env: []
            words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars 34>}]
            is_last_cmd: F
          )
        right: <Id.Eof_RParen ")">
      )
    }
  ]
  is_last_cmd: F
)(command.Simple
  blame_tok: <Id.Lit_Chars echo>
  more_env: []
  words: [
    {<Id.Lit_Chars echo>}
    {
      (DQ 
        (CommandSub
          left_token: <Id.Left_DollarParen "$(">
          child: 
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars 12>}]
              is_last_cmd: F
            )
          right: <Id.Eof_RParen ")">
        ) 
        (CommandSub
          left_token: <Id.Left_DollarParen "$(">
          child: 
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars 34>}]
              is_last_cmd: F
            )
          right: <Id.Eof_RParen ")">
        )
      )
    }
  ]
  is_last_cmd: F
)(command.CommandList
  children: [
    (command.DBracket
      left: <Id.KW_DLeftBracket "[[">
      expr: (bool_expr.Binary op_id:Id.BoolBinary_gt left:{($ Id.VSub_Pound)} right:{<Id.Lit_Chars 1>})
      right: <Id.Lit_DRightBracket "]]">
    )
  ]
)(command.CommandList
  children: [
    (command.DBracket
      left: <Id.KW_DLeftBracket "[[">
      expr: 
        (bool_expr.LogicalAnd
          left: 
            (bool_expr.Binary
              op_id: Id.BoolBinary_gt
              left: {($ Id.VSub_Pound)}
              right: {<Id.Lit_Chars 1>}
            )
          right: (bool_expr.WordTest w:{<Id.Lit_Chars foo>})
        )
      right: <Id.Lit_DRightBracket "]]">
    )
  ]
)(command.CommandList
  children: [
    (command.If
      if_kw: <Id.KW_If if>
      arms: [
        (IfArm
          keyword: <Id.KW_If if>
          cond: 
            (condition.Shell
              commands: [
                (command.DBracket
                  left: <Id.KW_DLeftBracket "[[">
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_gt
                      left: {($ Id.VSub_Pound)}
                      right: {<Id.Lit_Chars 1>}
                    )
                  right: <Id.Lit_DRightBracket "]]">
                )
              ]
            )
          then_kw: <I....d.KW_Then then>
          action: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
              is_last_cmd: F
            )
          ]
          then_tok: <Id.KW_Then then>
        )
      ]
      else_action: []
      fi_kw: <Id.KW_Fi fi>
    )
  ]
)(command.CommandList
  children: [
    (command.DBracket
      left: <Id.KW_DLeftBracket "[[">
      expr: 
        (bool_expr.Binary
          op_id: Id.BoolBinary_EqualTilde
          left: {<Id.Lit_Chars foo>}
          right: {<Id.Lit_Chars foo>}
        )
      right: <Id.Lit_DRightBracket "]]">
    )
  ]
)(command.CommandList
  children: [
    (command.DBracket
      left: <Id.KW_DLeftBracket "[[">
      expr: 
        (bool_expr.Binary
          op_id: Id.BoolBinary_EqualTilde
          left: {<Id.Lit_Chars foo>}
          right: 
            {
              (word_part.BashRegexGroup
                left: <Id.BashRegex_LParen "(">
                child: {<Id.Lit_Chars foo> <Id.Lit_Other "|"> <Id.Lit_Chars bar>}
                right: <Id.Right_BashRegexGroup ")">
              )
            }
        )
      right: <Id.Lit_DRightBracket "]]">
    )
  ]
)(command.CommandList
  children: [
    (command.DParen
      left: <Id.Op_DLeftParen "((">
      child: 
        (arith_expr.Binary
          op: <Id.Arith_Plus "+">
          left: {<Id.Lit_Digits 1>}
          right: {<Id.Lit_Digits 2>}
        )
      right: <Id.Op_DRightParen ")">
    )
  ]
)(command.CommandList
  children: [
    (command.ForEach
      keyword: <Id.KW_For for>
      iter_names: [i]
      iterable: (for_iter.Words words:[{<Id.Lit_Chars 1>} {<Id.Lit_Chars 2>} {<Id.Lit_Chars 3>}])
      semi_tok: <Id.Op_Semi ";">
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForEach
      keyword: <Id.KW_For for>
      iter_names: [i]
      iterable: (for_iter.Words words:[])
      semi_tok: <Id.Op_Semi ";">
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForEach
      keyword: <Id.KW_For for>
      iter_names: [i]
      iterable: (for_iter__Args)
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <Id.Lit_Chars echo>
                  more_env: []
                  words: [{<Id.Lit_Chars echo>} {($ i)}]
                  is_last_cmd: F
                )
              terminator: <Id.Op_Semi ";">
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForEach
      keyword: <Id.KW_For for>
      iter_names: [i]
      iterable: (for_iter__Args)
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForExpr
      keyword: <Id.KW_For for>
      init: 
        (arith_expr.BinaryAssign
          op_id: Id.Arith_Equal
          left: <Id.Lit_ArithVarLike i>
          right: {<Id.Lit_Digits 0>}
        )
      cond: 
        (arith_expr.Binary
     .     op: <Id.Arith_Less "<">
          left: <Id.Lit_ArithVarLike i>
          right: {<Id.Lit_Digits 5>}
        )
      update: (arith_expr.UnaryAssign op_id:Id.Arith_DPlus child:<Id.Lit_ArithVarLike i>)
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForExpr
      keyword: <Id.KW_For for>
      init: 
        (arith_expr.BinaryAssign
          op_id: Id.Arith_Equal
          left: <Id.Lit_ArithVarLike i>
          right: {<Id.Lit_Digits 0>}
        )
      cond: 
        (arith_expr.Binary
          op: <Id.Arith_Less "<">
          left: <Id.Lit_ArithVarLike i>
          right: {<Id.Lit_Digits 5>}
        )
      update: (arith_expr.UnaryAssign op_id:Id.Arith_DPlus child:<Id.Lit_ArithVarLike i>)
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ForExpr
      keyword: <Id.KW_For for>
      init: (arith_expr__EmptyZero)
      cond: (arith_expr__EmptyOne)
      update: ...0x7fedfba21250
      body: 
        (command.DoGroup
          left: <Id.KW_Do do>
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {($ i)}]
              is_last_cmd: F
            )
          ]
          right: <Id.KW_Done done>
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ShFunction
      name_tok: <Id.Lit_Chars foo>
      name: foo
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace "{">
          children: [
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <Id.Lit_Chars echo>
                  more_env: []
                  words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
                  is_last_cmd: F
                )
              terminator: <Id.Op_Semi ";">
            )
          ]
          right: <Id.Lit_RBrace "}">
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ShFunction
      name_tok: <Id.Lit_Chars foo>
      name: foo
      body: 
        (command.Subshell
          left: <Id.Op_LParen "(">
          child: 
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
              is_last_cmd: F
            )
          right: <Id.Right_Subshell ")">
          is_last_cmd: F
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ShFunction
      name_tok: <Id.Lit_Chars foo>
      name: foo
      body: 
        (command.ForEach
          keyword: <Id.KW_For for>
          iter_names: [i]
          iterable: (for_iter.Words words:[{<Id.Lit_Chars x>}])
          semi_tok: <Id.Op_Semi ";">
          body: 
            (command.DoGroup
              left: <Id.KW_Do do>
              children: [
                (command.Sentence
                  child: 
                    (command.Simple
                      blame_tok: <Id.Lit_Chars echo>
                      more_env: []
                      words: [{<Id.Lit_Chars echo>} {($ i)}]
                      is_last_cmd: F
                    )
                  terminator: <Id.Op_Semi ";">
                )
              ]
              right: <Id.KW_Done done>
            )
        )
    )
  ]
)(command.CommandList
  children: [
    (command.ShFunction
      keyword: <Id.KW_Function function>
      name_tok: <Id.Lit_Chars foo>
      name: foo
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace "{">
          children: [
            (command.Sentence
              child: 
                (command.Simple
                  blame_tok: <Id.Lit_Chars echo>
                  more_env: []
                  words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
                  is_last_cmd: F
                )
              terminator: <Id.Op_Semi ";">
            )
          ]
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              children: [
                (command.Simple
                  blame_tok: <Id.Lit_Chars ls>
                  more_env: []
                  words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
                  is_last_cmd: F
                )
                (command.Simple
                  blame_tok: <Id.Lit_Chars wc>
                  more_env: []
                  words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -l>}]
                  is_last_cmd: F
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              ]
              ops: [<Id.Op_Pipe "|">]
            )
            (command.Simple
              blame_tok: <Id.Lit_Chars die>
              more_env: []
              words: [{<Id.Lit_Chars die>}]
              is_last_cmd: F
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          ]
          ops: [<Id.Op_DPipe "||">]
        )
      terminator: <Id.Op_Semi ";">
    )
    (command.Simple
      blame_tok: <Id.Lit_Chars ls>
      more_env: []
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Slash />}]
      is_last_cmd: F
    )
  ]
)(command.CommandList
  children: [
    (command.Simple
      blame_tok: <Id.Lit_Chars ls>
      more_env: []
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
      is_last_cmd: F
    )
  ]
)(command.CommandList
  children: [
    (command.Sentence
      child: 
        (command.AndOr
          children: [
            (command.Pipeline
              children: [
                (command.Simple
                  blame_tok: <Id.Lit_Chars ls>
                  more_env: []
                  words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
                  is_last_cmd: F
                )
                (command.Simple
                  blame_tok: <Id.Lit_Chars wc>
                  more_env: []
                  words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -l>}]
                  is_last_cmd: F
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              ops: [<Id.Op_Pipe "|">]
            )
            (command.Simple
              blame_tok: <Id.Lit_Chars die>
              more_env: []
              words: [{<Id.Lit_Chars die>}]
              is_last_cmd: F
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          ]
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      terminator: <Id.Op_Semi ";">
    )
    (command.Simple
      blame_tok: <Id.Lit_Chars ls>
      more_env: []
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Slash />}]
      is_last_cmd: F
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  ]
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  children: [
    (command.Sentence
      child: 
        (command.AndOr
          children: [
            (command.Pipeline
              children: [
                (command.Simple
                  blame_tok: <Id.Lit_Chars ls>
                  more_env: []
                  words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
                  is_last_cmd: F
                )
                (command.Simple
                  blame_tok: <Id.Lit_Chars wc>
                  more_env: []
                  words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -l>}]
           .  (( 1 + ))
         ^
"<cmd_parse_test>":1: Token can't be used in prefix position
.  A= (1 2)
    ^
"<cmd_parse_test>":1: Expected ( after =
.  [[ foo bar ]]
         ^~~
"<cmd_parse_test>":1: Expected ]]
  [[ foo -eq ]]
               ^
"<cmd_parse_test>":1: Expected ]]
  [[ foo$(echo <) -eq foo ]]
                ^
"<cmd_parse_test>":1: Invalid token after redirect operator
.  ls <
      ^
"<cmd_parse_test>":1: Invalid token after redirect operator
  ls < <
       ^
"<cmd_parse_test>":1: Invalid token after redirect operator
  echo foo$(ls <)bar
                ^
"<cmd_parse_test>":1: Invalid token after redirect operator
  BAD_ENV=(1 2 3) ls
  ^~~~~~~~
"<cmd_parse_test>":1: Environment bindings can't contain array literals
  for ((i=1; i<)); do echo $i; done
               ^
"<cmd_parse_test>":1: Token can't be used in prefix position
  for ((i=1; i<5; ++i)) OOPS echo $i; ERR
                        ^~~~
"<cmd_parse_test>":1: Invalid word after for expression
  for ((i=1; i<5; ++i)); OOPS echo $i; ERR
                         ^~~~
"<cmd_parse_test>":1: Expected word type Id.KW_Do, got Id.Word_Compound
  for $bad in 1 2; do echo hi; done
      ^~~~
"<cmd_parse_test>":1: Expected loop variable (a constant word)
  for foo BAD
             ^
"<cmd_parse_test>":1: Expected loop variable (a constant word)
  if foo; then echo hi; z
                         ^
"<cmd_parse_test>":1: Expected word type Id.KW_Fi, got Id.Eof_Real
  foo$(invalid) () { echo hi; }
  ^~~
"<cmd_parse_test>":1: Invalid function name
.  foo="" echo "bar
              ^
"<cmd_parse_test>":1: Unexpected EOF reading double-quoted string that began here
..  for x in 1 2 $(
                 ^
"<cmd_parse_test>":1: Invalid word in for loop
.      for [ i = 1; i < 10; i++ ]
          ^
"<cmd_parse_test>":1: Invalid loop variable name '['
      for = in a
          ^
"<cmd_parse_test>":1: Invalid loop variable name '='
.  for x in 1 2 $(cat <<EOF
                     ^~
"<cmd_parse_test>":1: Couldn't find terminator for here doc that starts here
.      foo"bar" () {
      ^~~
"<cmd_parse_test>":1: Invalid function name
..       is_last_cmd: F
                )
              ]
              ops: [<Id.Op_Pipe "|">]
            )
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars fail>}]
              is_last_cmd: F
            )
          ]
          ops: [<Id.Op_DPipe "||">]
        )
      terminator: <Id.Op_Semi ";">
    )
    (command.AndOr
      children: [
        (command.Pipeline
          children: [
            (command.Simple
              blame_tok: <Id.Lit_Chars echo>
              more_env: []
              words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars bar>}]
              is_last_cmd: F
            )
            (command.Simple
              blame_tok: <Id.Lit_Chars wc>
              more_env: []
              words: [{<Id.Lit_Chars wc>} {<Id.Lit_Chars -c>}]
              is_last_cmd: F
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          ops: [<Id.Op_Pipe "|">]
        )
        (command.Simple
          blame_tok: <Id.Lit_Chars echo>
          more_env: []
          words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars f2>}]
          is_last_cmd: F
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      ops: [<Id.Op_DPipe "||">]
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  ]
)(command.Redirect
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    (command.Simple
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      more_env: []
      words: [{<Id.Lit_Chars cat>}]
      is_last_cmd: F
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      loc: (redir_loc.Fd fd:0)
      arg: 
        (redir_param.HereDoc
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          here_end_tok: <Id.Undefined_Tok "EOF\n">
          stdin_parts: [
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              child: 
                (command.CommandList
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            <Id.Lit_Chars " 4\n">
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        )
    )
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        (command.Simple
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        (redir_param.HereDoc
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              (command.ShAssignment
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                  words: [{<Id.Lit_Chars echo>} {<Id.Lit_Chars hi>}]
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      ) <Id.Lit_Chars cd>
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    {<Id.Lit_Chars ef>}
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                    (BracedVarSub
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                        (bracket_op.ArrayIndex
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      terminator: <Id.Op_Semi ";">
    .  errcmd=( "${SETUP_STATE[$err.cmd]}" )
                              ^
"<cmd_parse_test>":1: Unexpected token while parsing arithmetic: '.'
...)
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  ]
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      is_last_cmd: F
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          then_kw: <Id.KW_Then then>
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      else_action: []
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                (command.ControlFlow keyword:<Id.ControlFlow_Break break>)
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              fi_kw: <Id.KW_Fi fi>
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      else_action: []
      fi_kw: <Id.KW_Fi fi>
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    (command.Simple
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        (command.AndOr
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            (command.ForEach
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              iter_names: [e]
              iterable: (for_iter.Words words:[{($ existing)}])
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                (command.DoGroup
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                      arms_start: <Id.KW_In in>
                      arms: [
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                          action: [
                            (command.Simple
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                              more_env: []
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                                {<Id.Lit_Chars -f>}
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                                {(DQ ($ e) <Id.Lit_Chars .idx>)}
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                              is_last_cmd: F
                            )
                          ]
                          right: <Id.Op_DSemi ";;">
                        )
                      ]
                      arms_end: <Id.KW_Esac esac>
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                  ]
                  right: <Id.KW_Done done>
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            )
          ]
          ops: [<Id.Op_DAmp "&&">]
        )
      right: <Id.Right_Subshell ")">
      is_last_cmd: F
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    (command.Sentence
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        (command.Simple
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          words: [
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            {(DQ ($ TEST_DIRECTORY)) <Id.Lit_Slash /> <Id.Lit_Chars diff-lib.sh>}
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          is_last_cmd: F
        )
      terminator: <Id.Op_Semi ";">
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  ]
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    (command.Simple
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      more_env: []
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  ]
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    (command.Simple
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    )
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  arms: [
    (CaseArm
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            {<Id.Lit_Chars 3> <Id.Lit_Comma ",">}
          ]
        )
      middle: <Id.Right_CasePat ")">
      action: []
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  ]
  arms_end: <Id.KW_Esac esac>
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        (CaseArm
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                  (SingleQuoted
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            (command.ShAssignment
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        {
          (SingleQuoted
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  redirects: [
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      arg: 
        (redir_param.HereDoc
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          here_end_tok: <Id.Undefined_Tok "EOF\n">
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    (Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars out.txt>})
  ]
)(Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Li.........
----------------------------------------------------------------------
Ran 83 tests in 0.198s

OK
t_Chars out.txt>})(Redir
  op: <Id.Redir_DLess "<<">
  loc: (redir_loc.Fd fd:0)
  arg: (redir_param.HereDoc here_begin:{<Id.Lit_Chars EOF>} stdin_parts:[])
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      words: [{<Id.Lit_Chars cat>}]
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    )
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    (Redir op:<Id.Redir_GreatAnd "1>&"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars 2>})
  ]
)(command.Redirect
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    (command.Simple
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      words: [{<Id.Lit_Chars cat>}]
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  redirects: [(Redir op:<Id.Redir_LessAnd "<&"> loc:(redir_loc.Fd fd:0) arg:{<Id.Lit_Chars 3>})]
)(command.CommandList
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    (command.ShAssignment
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            (EnvPair
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          words: [{<Id.Lit_Chars env>}]
          is_last_cmd: F
        )
      redirects: [(Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars out.txt>})]
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  words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
  is_last_cmd: F
)(command.Redirect
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    (command.Simple
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        (EnvPair left:<Id.Lit_VarLike "SPAM="> name:SPAM val:{<Id.Lit_Chars eggs>})
      ]
      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
      is_last_cmd: F
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  redirects: [(Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars output.txt>})]
)(command.Redirect
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      words: [{<Id.Lit_Chars ls>} {<Id.Lit_Chars foo>}]
      is_last_cmd: F
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  redirects: [
    (Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars output.txt>})
    (Redir op:<Id.Redir_Great ">"> loc:(redir_loc.Fd fd:1) arg:{<Id.Lit_Chars output2.txt>})
  ]
)