Don't allow startup when default storage engine is specified to be a

storage engine that is disabled. This was fixed once in 4.1, but regressed
in 5.0 because of changes to storage engine initialization. (Bug #9815)

sql/mysqld.cc

@@ -3033,6 +3033,23 @@ server.");
     sql_print_error("Can't init databases");
     unireg_abort(1);
   }
+
+  /*
+    Check that the default storage engine is actually available.
+  */
+  if (!ha_storage_engine_is_enabled((enum db_type)
+                                    global_system_variables.table_type))
+  {
+    if (!opt_bootstrap)
+    {
+      sql_print_error("Default storage engine (%s) is not available",
+                      ha_get_storage_engine((enum db_type)
+                                            global_system_variables.table_type));
+      unireg_abort(1);
+    }
+    global_system_variables.table_type= DB_TYPE_MYISAM;
+  }
+
   tc_log= (total_ha_2pc > 1 ? (opt_bin_log  ?
                                (TC_LOG *) &mysql_bin_log :
                                (TC_LOG *) &tc_log_mmap) :
@@ -6999,22 +7016,6 @@ static void get_options(int argc,char **argv)
       !opt_slow_log)
     sql_print_warning("options --log-slow-admin-statements and --log-queries-not-using-indexes have no effect if --log-slow-queries is not set");
 
-  /*
-    Check that the default storage engine is actually available.
-  */
-  if (!ha_storage_engine_is_enabled((enum db_type)
-                                    global_system_variables.table_type))
-  {
-    if (!opt_bootstrap)
-    {
-      sql_print_error("Default storage engine (%s) is not available",
-                      ha_get_storage_engine((enum db_type)
-                                            global_system_variables.table_type));
-      exit(1);
-    }
-    global_system_variables.table_type= DB_TYPE_MYISAM;
-  }
-
   if (argc > 0)
   {
     fprintf(stderr, "%s: Too many arguments (first extra is '%s').\nUse --help to get a list of available options\n", my_progname, *argv);