Don't add references to objects we couldn't find.

That would SIGSEGV.

diff --git a/commit.c b/commit.c
index c6fdfd4..9fbcbd3 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -59,13 +59,16 @@ int parse_commit(struct commit *item)
                             sha1_to_hex(item->object.sha1));
        get_sha1_hex(bufptr + 5, parent);
        item->tree = lookup_tree(parent);
-       add_ref(&item->object, &item->tree->object);
+       if (item->tree)
+               add_ref(&item->object, &item->tree->object);
        bufptr += 46; /* "tree " + "hex sha1" + "\n" */
        while (!memcmp(bufptr, "parent ", 7) &&
               !get_sha1_hex(bufptr + 7, parent)) {
                struct commit *new_parent = lookup_commit(parent);
-               commit_list_insert(new_parent, &item->parents);
-               add_ref(&item->object, &new_parent->object);
+               if (new_parent) {
+                       commit_list_insert(new_parent, &item->parents);
+                       add_ref(&item->object, &new_parent->object);
+               }
                bufptr += 48;
        }
        item->date = parse_commit_date(bufptr);

diff --git a/tree.c b/tree.c
index 3537c11..26b7927 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -137,7 +137,8 @@ int parse_tree(struct tree *item)
                        entry->item.blob = lookup_blob(file_sha1);
                        obj = &entry->item.blob->object;
                }
-               add_ref(&item->object, obj);
+               if (obj)
+                       add_ref(&item->object, obj);
 
                *list_p = entry;
                list_p = &entry->next;