Problem in execute_cmd.c if configuration not COND_COMMAND and (DPAREN_ARITHMETIC or ARITH_FOR_COMMAND) is set. In this case, we can have a preprocessed code with an ELSE IF statement without an IF statement in function executing_line_number. The code part is shown bellow:

#if defined (COND_COMMAND)
      if (currently_executing_command->type == cm_cond)
return currently_executing_command->value.Cond->line;
#endif
#if defined (DPAREN_ARITHMETIC)
      else if (currently_executing_command->type == cm_arith)
return currently_executing_command->value.Arith->line;
#endif
#if defined (ARITH_FOR_COMMAND)
      else if (currently_executing_command->type == cm_arith_for)
return currently_executing_command->value.ArithFor->line;
#endif

The correction is attached in file (execute_cmd-modified-flaviomedeiros.c).