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infer_clone/infer/documentation/issues/BAD_POINTER_COMPARISON.md

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Infer reports these warnings in Objective-C when a boxed primitive type such as NSNumber * is coerced to a boolean in a comparison. For example, consider the code

void foo(NSNumber * n) {
  if (n) ...

The branch in the above code will be taken when the pointer n is non-nil, but the programmer might have actually wanted the branch to be taken when the integer pointed to by n is nonzero (e.g., she may have meant to call an accessor like [n intValue] instead). Infer will ask the programmer explicitly compare n to nil or call an accessor to clarify her intention.