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test20.c: In function 'func2':
test20.c:16:9: warning: Using variable 'ptr3' without checking for null pointer
ptr3->val = 100;
^
test20.c: In function 'func4':
test20.c:31:14: warning: Useless variable check 'ptr1'. It already was checked before
else if (!ptr1 && ptr2)
^
test20.c: In function 'func6':
test20.c:52:9: warning: Using variable 'ptr3' without checking for null pointer
ptr3->val = 100;
^
test20.c: In function 'func7':
test20.c:66:9: warning: Using parameter 'ptr1' without checking for null pointer
ptr1->val = 100;
^
test20.c:67:9: warning: Using variable 'ptr3' without checking for null pointer
ptr3->val = 200;
^
test20.c: In function 'func8':
test20.c:81:9: warning: Using parameter 'ptr1' without checking for null pointer
ptr1->val = 100;
^
test20.c:82:9: warning: Using variable 'ptr3' without checking for null pointer
ptr3->val = 200;
^
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