When I passed NaN and an object with the "valueOf" attribute value as a callable function to the first and second parameters of Math.max, chakra did not execute this function. According to the ES10 standard, the ToNumber operation is performed on each parameter of Math.max, and the "valueOf" attribute value function of the second parameter will be executed.

version

chakra-1_11_22

command

ChakraCore/out/Debug/ch testcase.js

testcase

var NISLFuzzingFunc = function(){
    var a = {
        valueOf: function(){
            print(1);
        }
    };
    var b = Math.max(NaN,a);
};
NISLFuzzingFunc();

Output

No output.

Expected behavior

Output 1.

Contributor : @Haobin-Lee