Increment Or Decrement On Floating Point

Reports ++ or --, prefix or postfix, applied to a variable declared float, double, Float or Double.

Increment and decrement read intuitively as "the next integer", and most developers expect x++ to behave like it does on int or long. Floating-point precision breaks that expectation: once a value is large enough, adding 1.0 can be too small a change to represent, and the operation does nothing:

The same loop written with int terminates normally, because integer arithmetic has no such precision cliff. The floating-point version compiles cleanly and looks identical to a working loop, so the defect only shows up at runtime, as a hang.

Use the compound assignment operator instead; it is exactly as short and states the increment explicitly: