XPC_C_CLOSEREQUEST
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));