It was invalidated again by Fujii's patch to 9.1.
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));
/*
- * BACKUP METHOD line is new in 9.2. We can't restore from an older backup
+ * BACKUP METHOD line is new in 9.1. We can't restore from an older backup
* anyway, but since the information on it is not strictly required, don't
* error out if it's missing for some reason.
*/