pack-objects: don't check size when the object is bad

sha1_object_info() in check_objects() may fail to locate an object in
the pack and return type OBJ_BAD. In that case, it will likely leave
the "size" field untouched. We delay error handling until later in
prepare_pack() though. Until then, do not touch "size" field.

This field should contain the default value zero, but we can't say
sha1_object_info() cannot damage it. This becomes more important later
when the object size may have to be retrieved back from the
(non-existing) pack.

Signed-off-by: Nguyễn Thái Ngọc Duy <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pclouds

builtin/pack-objects.c

@@ -1742,7 +1742,7 @@ static void get_object_details(void)
 	for (i = 0; i < to_pack.nr_objects; i++) {
 		struct object_entry *entry = sorted_by_offset[i];
 		check_object(entry);
-		if (big_file_threshold < entry->size)
+		if (entry->type_valid && big_file_threshold < entry->size)
 			entry->no_try_delta = 1;
 	}
 
@@ -2453,7 +2453,7 @@ static void prepare_pack(int window, int depth)
 			 */
 			continue;
 
-		if (entry->size < 50)
+		if (!entry->type_valid || entry->size < 50)
 			continue;
 
 		if (entry->no_try_delta)