(command.CommandList
  children: [
    (C {<_Dbg_help_add_sub>} {<info>} {<line>} 
      {
        (SQ <'**info line**\n'> <'\n'> <'Show line and filename for stopped position in program.\n'> 
          <'\n'> <'See also:\n'> <'---------\n'> <'\n'> <'**info program**.'>
        )
      } {<1>}
    )
    (command.ShFunction
      name: _Dbg_do_info_line
      body: 
        (BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.DParen
                              child: 
                                (arith_expr.Unary
                                  op_id: Id.Arith_Bang
                                  child: <Id.Lit_ArithVarLike _Dbg_running>
                                )
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (C {<_Dbg_errmsg>} {(SQ <'No line number information available.'>)})
                    (command.ControlFlow
                      token: <Id.ControlFlow_Return return>
                      arg_word: {<1>}
                    )
                  ]
                  spids: [86 99]
                )
              ]
            )
            (C {<_Dbg_msg>} 
              {
                (DQ <'Line '> ($ Id.VSub_DollarName '$_Dbg_frame_last_lineno') <' of '> 
                  (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'>) ($ Id.VSub_DollarName '$_Dbg_frame_last_filename') 
                  (word_part.EscapedLiteral token:<Id.Lit_EscapedChar '\\"'>)
                )
              }
            )
            (command.ControlFlow token:<Id.ControlFlow_Return return> arg_word:{<0>})
          ]
        )
    )
  ]
)