Analyzer Warning: assigned value is garbage or undefined

Question

I have an app that is near completion and am getting the following error whe running Analyze:

Assigned value is garbage or undefined

The error is occurring on this line of code:

float flowSourceValue = flowSource[count];

When running debugger, code DOES enter this for loop and floatSourceValue DOES get assigned.

if(gaugeReportsCFS){
    count = 0;
    gaugeCount = [flowKeys count];
    float tally = 0.0;
    float flowSource[gaugeCount];
    for (NSString *key in flowKeys){
        float flowSourceValue = flowSource[count]; //assigned value is garbage or undefined
        if(flowSourceValue < 1){
            gaugeReportsCFS = NO;
            gaugeReportsFeet = YES;
        } else {
            if(!isnan(flowSource[count])){
                flowSource[count] = [[rvrGauge.gaugeFlowList objectForKey:key] integerValue];
                tally += flowSource[count];
            }
        }
        count++;
    }
}

What could be the reason I am getting this warning? Thanks!

Answer 1

The local array

 float flowSource[gaugeCount];

Is not initialized and therefore can contain "garbage". Accessing it is undefined behavior.