Indicator with '#property strict' directive showing line display issue

The below code with

#property strict

directive compiles without error, but doesn't display anything.

If you comment '#property strict' directive

//#property strict

it will also compile without error and the indicator will display a line.

Not working code:

#property strict
#property indicator_separate_window
#property indicator_buffers 1
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrDodgerBlue
#property indicator_style1  STYLE_SOLID
#property indicator_width1  2

double lineBuffer[];

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
{
    IndicatorBuffers(1);
    SetIndexBuffer(0, lineBuffer, INDICATOR_DATA);

    return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
{
    static  int i;

    for(i=rates_total - prev_calculated; i>=0; i--)     lineBuffer[i] = open[i];

    return(rates_total);
}

What is going wrong?