I have found a bug. We are trying to check if a given string is Json. The string we are putting into the isJson function happens to be a hexadecimal string.

isJson("7E58651173259DD1");

results in

lucee.runtime.exp.NativeException: Too many nonzero exponent digits.

isJson("5E7770101309BD75");

results in

lucee.runtime.exp.NativeException: Exponent overflow.

(tested on lucee deviant-lucee 5.3.9.146 )