View Compilation Error

0_0_17858246_19231.cpp: In function 'll CRT(ll*, ll*, ll, ll)':
0_0_17858246_19231.cpp:34:30: error: invalid initialization of reference of type 'int&' from expression of type 'll {aka long long int}'
         extGcd(m[i], Mi, x, y);
                              ^
0_0_17858246_19231.cpp:18:6: note: in passing argument 3 of 'void extGcd(int, int, int&, int&)'
 void extGcd(int a, int b, int& x, int& y) {
      ^