(command.CommandList
  children: [
    (command.Simple
      blame_tok: <_Dbg_help_add>
      more_env: []
      words: [
        {<_Dbg_help_add>}
        {<source>}
        {(SQ <'**source** *file*\n'> <'\n'> <'Run debugger commands in *file*.'>)}
      ]
      redirects: []
      do_fork: T
    )
    (command.ShFunction
      name_tok: <_Dbg_do_source>
      name: _Dbg_do_source
      body: 
        (BraceGroup
          left: <Id.Lit_LBrace '{'>
          children: [
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DParen
                              left: <Id.Op_DLeftParen _>
                              child: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_DEqual
                                  left: {($ Id.VSub_Pound '#')}
                                  right: {<Id.Lit_Digits 0>}
                                )
                              right: <Id.Op_DRightParen _>
                              redirects: []
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <_Dbg_errmsg>
                      more_env: []
                      words: [
                        {<_Dbg_errmsg>}
                        {(SQ <'Need to give a filename for the "source" command.'>)}
                      ]
                      redirects: []
                      do_fork: T
                    )
                    (command.ControlFlow
                      keyword: <Id.ControlFlow_Return return>
                      arg_word: {<1>}
                    )
                  ]
                  spids: [90 105]
                )
              ]
              else_action: []
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.Simple
              blame_tok: <typeset>
              more_env: []
              words: [{<typeset>} {<filename>}]
              redirects: []
              do_fork: T
            )
            (command.Simple
              blame_tok: <_Dbg_tilde_expand_filename>
              more_env: []
              words: [{<_Dbg_tilde_expand_filename>} {(DQ ($ Id.VSub_Number 1))}]
              redirects: []
              do_fork: T
            )
            (command.If
              if_kw: <Id.KW_If if>
              arms: [
                (IfArm
                  keyword: <Id.KW_If if>
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.AndOr
                              children: [
                                (command.DBracket
                                  left: <Id.KW_DLeftBracket '[['>
                                  expr: 
                                    (bool_expr.Unary
                                      op_id: Id.BoolUnary_r
                                      child: {($ Id.VSub_DollarName filename)}
                                    )
                                  right: <Id.Lit_DRightBracket ']]'>
                                  redirects: []
                                )
                                (command.DBracket
                                  left: <Id.KW_DLeftBracket '[['>
                                  expr: 
                                    (bool_expr.Binary
                                      op_id: Id.BoolBinary_GlobDEqual
                                      left: {(DQ ($ Id.VSub_DollarName filename))}
                                      right: {(SQ <'/dev/stdin'>)}
                                    )
                                  right: <Id.Lit_DRightBracket ']]'>
                                  redirects: []
                                )
                              ]
                              ops: [<Id.Op_DPipe _>]
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  then_kw: <Id.KW_Then then>
                  action: [
                    (command.Simple
                      blame_tok: <exec>
                      more_env: []
                      words: [{<exec>}]
                      redirects: [
                        (Redir
                          op: <Id.Redir_Less '{_Dbg_fdi}<'>
                          loc: (redir_loc.VarName name:_Dbg_fdi)
                          arg: {(DQ ($ Id.VSub_DollarName filename))}
                        )
                      ]
                      do_fork: T
                    )
                    (command.ShAssignment
                      left: <Id.Lit_ArrayLhsOpen '_Dbg_fd['>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_ArrayLhsOpen '_Dbg_fd['>
                          lhs: 
                            (sh_lhs_expr.IndexedName
                              left: <Id.Lit_ArrayLhsOpen '_Dbg_fd['>
                              name: _Dbg_fd
                              index: 
                                (arith_expr.UnaryAssign
                                  op_id: Id.Arith_DPlus
                                  child: ($ Id.Lit_ArithVarLike _Dbg_fd_last)
                                )
                            )
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName _Dbg_fdi)}
                        )
                      ]
                      redirects: []
                    )
                    (command.ShAssignment
                      left: <Id.Lit_VarLike '_Dbg_cmdfile+='>
                      pairs: [
                        (AssignPair
                          left: <Id.Lit_VarLike '_Dbg_cmdfile+='>
                          lhs: 
                            (sh_lhs_expr.Name
                              left: <Id.Lit_VarLike '_Dbg_cmdfile+='>
                              name: _Dbg_cmdfile
                            )
                          op: assign_op.PlusEqual
                          rhs: 
                            {
                              (ShArrayLiteral
                                left: <Id.Op_LParen _>
                                words: [{(DQ ($ Id.VSub_DollarName filename))}]
                                right: <Id.Right_ShArrayLiteral _>
                              )
                            }
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [136 164]
                )
              ]
              else_kw: <Id.KW_Else else>
              else_action: [
                (command.Simple
                  blame_tok: <_Dbg_errmsg>
                  more_env: []
                  words: [
                    {<_Dbg_errmsg>}
                    {
                      (DQ <'Source file '> 
                        (word_part.EscapedLiteral
                          token: <Id.Lit_EscapedChar '\\"'>
                          ch: '"'
                        ) ($ Id.VSub_DollarName filename) (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'> ch:'"') 
                        <' is not readable.'>
                      )
                    }
                  ]
                  redirects: []
                  do_fork: T
                )
                (command.ControlFlow
                  keyword: <Id.ControlFlow_Return return>
                  arg_word: {<3>}
                )
              ]
              fi_kw: <Id.KW_Fi fi>
              redirects: []
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
          redirects: []
          right: <Id.Lit_RBrace '}'>
        )
    )
  ]
)