+ if (newenv && !(flags & MDB_FIXEDMAP)) {
+ /* mdb_env_map() may grow the datafile. Write the metapages
+ * first, so the file will be valid if initialization fails.
+ * Except with FIXEDMAP, since we do not yet know mm_address.
+ * We could fill in mm_address later, but then a different
+ * program might end up doing that - one with a memory layout
+ * and map address which does not suit the main program.
+ */
+ rc = mdb_env_init_meta(env, &meta);
+ if (rc)
+ return rc;
+ newenv = 0;
+ }
+