test13.c: In function 'func1':
test13.c:12:8: warning: Using variable 'b' without checking for null pointer
     *b = 100;
        ^
test13.c: In function 'func2':
test13.c:17:9: warning: Using variable 'b' without checking for null pointer
     *(1 + b) = 200;
         ^
test13.c: In function 'func3':
test13.c:22:9: warning: Using variable 'b' without checking for null pointer
     *(1 + (1 + b)) = 300;
         ^
test13.c: In function 'func5':
test13.c:28:12: warning: Using variable 'b' without checking for null pointer
     *(var1 + b) = 400;
            ^
test13.c: In function 'func6':
test13.c:34:11: warning: Using variable 'var2' without checking for null pointer
     *var2 = 500;
           ^
test13.c: In function 'func7':
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
     int *var3 = 12 + b;
                    ^
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
test13.c:39:20: warning: Using variable 'b' without checking for null pointer
test13.c: In function 'func8':
test13.c:45:18: warning: Using variable 'bptr' without checking for null pointer
     int **var4 = &bptr;
                  ^
test13.c:45:18: warning: Using variable 'bptr' without checking for null pointer
test13.c:45:18: warning: Using variable 'bptr' without checking for null pointer
test13.c:45:18: warning: Using variable 'bptr' without checking for null pointer