check results of parse_commit in merge_bases

diff --git a/revision.c b/revision.c
index 6e85aaa3fb30e98f3b02f094af7f1763577cdb8d..484e5e7959d4583ed474e81f3a39e4569f2c7b76 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -46,6 +46,8 @@ void add_object(struct object *obj,
 
 static void mark_blob_uninteresting(struct blob *blob)
 {
+       if (!blob)
+               return;
        if (blob->object.flags & UNINTERESTING)
                return;
        blob->object.flags |= UNINTERESTING;
@@ -57,6 +59,8 @@ void mark_tree_uninteresting(struct tree *tree)
        struct name_entry entry;
        struct object *obj = &tree->object;
 
+       if (!tree)
+               return;
        if (obj->flags & UNINTERESTING)
                return;
        obj->flags |= UNINTERESTING;