"Overflowing an int" is something that I worry about when I'm thinking in terms of memory layout of data. I shouldn't have to worry about it when working at a higher level of abstraction. Python handles this correctly:
>>> int('0x7fffffff', 16)
2147483647
>>> int('0x7fffffff', 16) + 1
2147483648L
If you're dancing on the edge of the limits of numerical representation then you need to write code to protect against bad things. If you don't write said code, your program is going to fail to work correctly, no matter what language you use.