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pointer points outside of underlying object

Hoffiz
Expert 1670 points

I'm getting the following warning:

pointer points outside of underlying object

when declaring a variable like this:

unsigned char *lpktoptr = packeto[16] + (unsigned int)(CHANNELS-8);

Read this thread but not sure if it is the same case or something different. 

TLV316: Graph "Output Voltage Swing vs Output Current" - Amplifiers forum - Amplifiers - TI E2E support...

e2e.ti.com
Part Number: TLV316 Other Parts Discussed in Thread: OPA316 Hi support team. I can't find the graph "Output Voltage Swing vs Output Current" in datasheet. Could

In any case I could not figure out why is it happening. Any suggestions?

  • Expert 1820 points

    The compiler detected that lpktoptr points outside the array packeto. We cannot tell the exact reason without knowing the surrounding code, but here are a few suggestions:

    • packeto's length is less than 16 + (CHANNELS-8)
    • CHANNELS is less than 8, making (unsigned int)(CHANNELS-8) huge
    • CHANNELS is actually undefined, so that the compiler sees (unsigned int)(-8)

    Hope that helps

    Markus

  • in reply to Markus Moll
    Expert 1820 points
    Whoops, I saw an ampersand where there wasn't any. Are you sure you didn't mean to write "&packeto[16]"? What type is packeto?