test15.c: In function 'func1':
test15.c:7:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c:11:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 100;
               ^
test15.c:13:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 200;
               ^
test15.c:14:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 300;
           ^
test15.c: In function 'func2':
test15.c:21:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c:26:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 100;
               ^
test15.c:29:11: warning: Using variable 'ptr1' without checking for null pointer
     *ptr1 = 200;
           ^
test15.c:30:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 300;
           ^
test15.c: In function 'func3':
test15.c:46:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 300;
           ^
test15.c: In function 'func5':
test15.c:77:11: warning: Using variable 'ptr1' without checking for null pointer
     *ptr1 = 200;
           ^
test15.c:78:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 300;
           ^
test15.c: In function 'func7':
test15.c:101:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 100;
               ^
test15.c:102:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 200;
               ^
test15.c:109:11: warning: Using variable 'ptr1' without checking for null pointer
     *ptr1 = 300;
           ^
test15.c:110:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 400;
           ^
test15.c: In function 'func8':
test15.c:123:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 300;
               ^
test15.c:124:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c: In function 'func9':
test15.c:136:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 100;
               ^
test15.c:141:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 200;
               ^
test15.c: In function 'func10':
test15.c:159:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 300;
               ^
test15.c:160:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c:163:11: warning: Using variable 'ptr1' without checking for null pointer
     *ptr1 = 500;
           ^
test15.c:164:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 600;
           ^
test15.c: In function 'func11':
test15.c:172:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 200;
               ^
test15.c:177:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 300;
               ^
test15.c:178:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c:181:11: warning: Using variable 'ptr1' without checking for null pointer
     *ptr1 = 500;
           ^
test15.c:182:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 600;
           ^
test15.c: In function 'func12':
test15.c:189:15: warning: Using variable 'ptr1' without checking for null pointer
         *ptr1 = 100;
               ^
test15.c:190:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 200;
               ^
test15.c:196:15: warning: Using variable 'ptr2' without checking for null pointer
         *ptr2 = 400;
               ^
test15.c:200:11: warning: Using variable 'ptr2' without checking for null pointer
     *ptr2 = 600;
           ^