#include "bisect.h"
 #include "sha1-array.h"
 #include "argv-array.h"
+#include "commit-slab.h"
 
 static struct oid_array good_revs;
 static struct oid_array skipped_revs;
        }
 }
 
+define_commit_slab(commit_weight, int *);
+static struct commit_weight commit_weight;
+
 #define DEBUG_BISECT 0
 
 static inline int weight(struct commit_list *elem)
 {
-       return *((int*)(elem->item->util));
+       return **commit_weight_at(&commit_weight, elem->item);
 }
 
 static inline void weight_set(struct commit_list *elem, int weight)
 {
-       *((int*)(elem->item->util)) = weight;
+       **commit_weight_at(&commit_weight, elem->item) = weight;
 }
 
 static int count_interesting_parents(struct commit *commit)
                struct commit *commit = p->item;
                unsigned flags = commit->object.flags;
 
-               p->item->util = &weights[n++];
+               *commit_weight_at(&commit_weight, p->item) = &weights[n++];
                switch (count_interesting_parents(commit)) {
                case 0:
                        if (!(flags & TREESAME)) {
        int *weights;
 
        show_list("bisection 2 entry", 0, 0, *commit_list);
+       init_commit_weight(&commit_weight);
 
        /*
         * Count the number of total and tree-changing items on the
        }
        free(weights);
        *commit_list = best;
+       clear_commit_weight(&commit_weight);
 }
 
 static int register_ref(const char *refname, const struct object_id *oid,
 
 static struct commit *get_commit_reference(const struct object_id *oid)
 {
-       struct commit *r = lookup_commit_reference(oid);
+       struct commit *r = lookup_commit_reference(the_repository, oid);
        if (!r)
                die(_("Not a valid commit name %s"), oid_to_hex(oid));
        return r;