linked.c: (in function node_free1)
linked.c:10:9: Only storage n->next (type node) derived from released storage
                  is not released (memory leak): n
linked.c: (in function node_free2)
linked.c:17:2: Only storage nn not released before return
   linked.c:16:9: Storage nn becomes only
linked.c:15:8: Variable nn declared but not used
linked.c: (in function node_free3)
linked.c:23:15: Possibly null storage nn passed as non-null param:
                   node_free1 (nn)
   linked.c:21:13: Storage nn may become null

Finished checking --- 4 code warnings, as expected

linked2.c: (in function node_free2)
linked2.c:15:8: Variable nn declared but not used
linked2.c: (in function node_free3)
linked2.c:23:15: Possibly null storage nn passed as non-null param:
                    node_free1 (nn)
   linked2.c:21:13: Storage nn may become null
linked2.c:23:15: Dependent storage nn passed as only param: node_free1 (nn)
   linked2.c:23:15: Storage nn becomes dependent (through alias n->next)

Finished checking --- 3 code warnings, as expected

linked3.c: (in function node_free1)
linked3.c:10:9: Only storage n->val (type char *) derived from released storage
                   is not released (memory leak): n
linked3.c:10:9: Only storage n->next (type node) derived from released storage
                   is not released (memory leak): n
linked3.c: (in function node_free2)
linked3.c:16:9: Only storage n->val (type char *) derived from released storage
                   is not released (memory leak): n
linked3.c:17:2: Only storage nn not released before return
   linked3.c:16:9: Storage nn becomes only
linked3.c:15:8: Variable nn declared but not used

Finished checking --- 5 code warnings, as expected

linked4.c: (in function node_free1)
linked4.c:14:9: Only storage n->val (type item) derived from released storage
                   is not released (memory leak): n
linked4.c:14:9: Only storage n->next (type node) derived from released storage
                   is not released (memory leak): n
linked4.c: (in function node_free2)
linked4.c:20:9: Only storage n->val (type item) derived from released storage
                   is not released (memory leak): n
linked4.c:21:2: Only storage nn not released before return
   linked4.c:20:9: Storage nn becomes only
linked4.c:19:8: Variable nn declared but not used
linked4.c: (in function node_free3)
linked4.c:26:9: Only storage n->val->val (type char *) derived from released
                   storage is not released (memory leak): n->val

Finished checking --- 6 code warnings, as expected

linked5.c: (in function node_free1)
linked5.c:14:9: Only storage n->next (type node) derived from released storage
                   is not released (memory leak): n
linked5.c: (in function node_free2)
linked5.c:21:2: Only storage nn not released before return
   linked5.c:20:9: Storage nn becomes only
linked5.c:19:8: Variable nn declared but not used
linked5.c: (in function node_free3)
linked5.c:26:9: Dependent storage n->val passed as only param: free (n->val)

Finished checking --- 4 code warnings, as expected

linked6.c: (in function node_free1)
linked6.c:16:9: Only storage n->val (type item) derived from released storage
                   is not released (memory leak): n
linked6.c:16:9: Only storage n->next (type node) derived from released storage
                   is not released (memory leak): n
linked6.c: (in function node_free2)
linked6.c:24:2: Only storage nn not released before return
   linked6.c:23:9: Storage nn becomes only
linked6.c:21:8: Variable nn declared but not used

Finished checking --- 4 code warnings, as expected