mimic: tools: crushtool crash on Fedora 28 and newer

src/crush/CrushCompiler.cc

@@ -744,7 +744,7 @@ int CrushCompiler::parse_bucket(iter_t const& i)
   assert(id != 0);
   int idout;
   int r = crush.add_bucket(id, alg, hash, type, size,
-                           &items[0], &weights[0], &idout);
+                           items.data(), weights.data(), &idout);
   if (r < 0) {
     if (r == -EEXIST)
       err << "Duplicate bucket id " << id << std::endl;

src/test/cli/crushtool/empty-default.cushmap.txt

@@ -0,0 +1,42 @@
+# begin crush map
+tunable choose_local_tries 0
+tunable choose_local_fallback_tries 0
+tunable choose_total_tries 50
+tunable chooseleaf_descend_once 1
+tunable chooseleaf_vary_r 1
+tunable chooseleaf_stable 0
+tunable straw_calc_version 1
+tunable allowed_bucket_algs 22
+
+# types
+type 0 osd
+type 1 host
+type 2 chassis
+type 3 rack
+type 4 row
+type 5 pdu
+type 6 pod
+type 7 room
+type 8 datacenter
+type 9 region
+type 10 root
+
+# default bucket
+root default {
+    id -1   # do not change unnecessarily
+    alg straw
+    hash 0  # rjenkins1
+}
+
+# rules
+rule replicated_ruleset {
+    ruleset 0
+    type replicated
+    min_size 1
+    max_size 10
+    step take default
+    step chooseleaf firstn 0 type host
+    step emit
+}
+
+# end crush map

src/test/cli/crushtool/empty-default.t

@@ -0,0 +1,2 @@
+  $ crushtool -c "$TESTDIR/empty-default.cushmap.txt"
+  crushtool successfully built or modified map.  Use '-o <file>' to write it out.