tree-wide: add some asserts

src/resolve/resolved-etc-hosts.c

@@ -285,6 +285,8 @@ int etc_hosts_parse(EtcHosts *hosts, FILE *f) {
         unsigned nr = 0;
         int r;
 
+        assert(hosts);
+
         for (;;) {
                 _cleanup_free_ char *line = NULL;
                 char *l;

src/shared/cpu-set-util.c

@@ -145,6 +145,8 @@ int parse_cpu_set_full(
         _cleanup_(cpu_set_reset) CPUSet c = {};
         const char *p = ASSERT_PTR(rvalue);
 
+        assert(cpu_set);
+
         for (;;) {
                 _cleanup_free_ char *word = NULL;
                 unsigned cpu_lower, cpu_upper;
@@ -198,6 +200,8 @@ int parse_cpu_set_extend(
         _cleanup_(cpu_set_reset) CPUSet cpuset = {};
         int r;
 
+        assert(old);
+
         r = parse_cpu_set_full(rvalue, &cpuset, true, unit, filename, line, lvalue);
         if (r < 0)
                 return r;