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                          (DQ 
                            (braced_var_sub
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          spids: [62 81]
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      iter_words: [{<require>} {<pre>} {<vars>} {<io>}]
      do_arg_iter: F
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        (command.DoGroup
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      iter_words: [
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        {(${ Id.VSub_Name _Dbg_libdir) <'/command/'> <Id.Lit_Star '*'> <.sh>}
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      body: (command.DoGroup children:[(C {<source>} {($ Id.VSub_DollarName '$_Dbg_file')})])
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        (if_arm
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              terminator: <Id.Op_Semi _>
            )
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          action: [(C {<_Dbg_do_source>} {<'/dev/stdin'>})]
          spids: [175 187]
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            (command.Sentence
              child: 
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                (DQ 
                  (braced_var_sub
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                  lhs: (sh_lhs_expr.Name name:_Dbg_no_nx)
                  op: assign_op.Equal
                  rhs: {<1>}
                  spids: [284]
                )
              ]
            )
          ]
          spids: [246 260]
        )
      ]
    )
    (C {<typeset>} 
      {<Id.Lit_VarLike '_Dbg_startup_cmdfile='> 
        (braced_var_sub
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          suffix_op: 
            (suffix_op.Unary
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              arg_word: {(word_part.TildeSub token:<Id.Lit_TildeLike '~'>)}
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      }
    )
    (command.If
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                          left: {<Id.Lit_Digits 0>}
                          right: <Id.Lit_ArithVarLike _Dbg_o_nx>
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                    )
                    (command.DBracket
                      expr: 
                        (bool_expr.Unary
                          op_id: Id.BoolUnary_r
                          child: {(DQ ($ Id.VSub_DollarName '$_Dbg_startup_cmdfile'))}
                        )
                    )
                  ]
                )
              terminator: <Id.Op_Semi _>
            )
          ]
          action: [(C {<_Dbg_do_source>} {(DQ ($ Id.VSub_DollarName '$_Dbg_startup_cmdfile'))})]
          spids: [304 330]
        )
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    )
    (command.If
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        (if_arm
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            (command.Sentence
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                (command.DBracket
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                    (bool_expr.Unary
                      op_id: Id.BoolUnary_z
                      child: {(DQ (${ Id.VSub_Name _Dbg_DEBUGGER_LEVEL))}
                    )
                )
              terminator: <Id.Op_Semi _>
            )
          ]
          action: [(C {<typeset>} {<-xi>} {<Id.Lit_VarLike '_Dbg_DEBUGGER_LEVEL='> <1>})]
          spids: [348 364]
        )
      ]
    )
    (command.If
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        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DBracket
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_GlobDEqual
                      left: 
                        {
                          (braced_var_sub
                            token: <Id.VSub_Name _Dbg_libdir>
                            suffix_op: 
                              (suffix_op.Slice
                                begin: {<Id.Lit_Digits 0>}
                                length: {<Id.Lit_Digits 1>}
                              )
                          )
                        }
                      right: {(SQ <.>)}
                    )
                )
              terminator: <Id.Op_Semi _>
            )
          ]
          action: [
            (command.ShAssignment
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                (assign_pair
                  lhs: (sh_lhs_expr.Name name:_Dbg_libdir)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (command_sub
                        left_token: <Id.Left_DollarParen '$('>
                        child: 
                          (C {<_Dbg_expand_filename>} 
                            {(${ Id.VSub_Name _Dbg_init_cwd) <'/'> (${ Id.VSub_Name _Dbg_libdir)}
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                      )
                    }
                  spids: [416]
                )
              ]
            )
          ]
          spids: [387 409]
        )
      ]
    )
    (command.ForEach
      iter_name: source_file
      iter_words: [
        {
          (braced_var_sub
            token: <Id.VSub_Name _Dbg_o_init_files>
            bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
          )
        }
        {(DQ ($ Id.VSub_DollarName '$DBG_RESTART_FILE'))}
      ]
      do_arg_iter: F
      body: 
        (command.DoGroup
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            (command.If
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                (if_arm
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                    (command.Sentence
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                              op_id: Id.BoolUnary_n
                              child: {(DQ ($ Id.VSub_DollarName '$source_file'))}
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                        )
                      terminator: <Id.Op_Semi _>
                    )
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                  action: [
                    (command.If
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                        (if_arm
                          cond: [
                            (command.Sentence
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                                          op_id: Id.BoolUnary_r
                                          child: {(DQ ($ Id.VSub_DollarName '$source_file'))}
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                                    )
                                    (command.DBracket
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                                        (bool_expr.Unary
                                          op_id: Id.BoolUnary_f
                                          child: {(DQ ($ Id.VSub_DollarName '$source_file'))}
                                        )
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          action: [(C {<source>} {($ Id.VSub_DollarName '$source_file')})]
                          spids: [470 496]
                        )
                      ]
                      else_action: [
                        (C {<_Dbg_errmsg>} 
                          {(DQ <'Unable to read shell script: '> (${ Id.VSub_Name source_file))}
                        )
                      ]
                    )
                  ]
                  spids: [453 467]
                )
              ]
            )
          ]
        )
    )
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)