| If a conditional expression evaluates to `null`, unboxing it will result in a | |
| `NullPointerException`. | |
| For example: | |
| ```java | |
| int x = flag ? foo : null; | |
| ``` | |
| If `flag` is false, `null` will be auto-unboxed from an `Integer` to `int`, | |
| resulting in a NullPointerException. |