lexical parse of hex literal fails to handle overflow: lua 5.3 and 5.4-alpha

[Payo Nel <payonel@...>]

the lexical parser continues to read hex values, ignoring that the value may be overflowing the maximum integer

e.g. on 64 bit lua (5.3 and 5.4-alpha have the same issue)

> 0x7FFFFFFFFFFFFFFF

9223372036854775807

> 0xFFFFFFFFFFFFFFFF

-1

> 0xFFFFFFFFFFFFFFFFF

-1

> 0x10000000000000000

0

> 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

-1

expected:

the l_str2int should fail and the lexical parser should fall back to floats