Issue 2628
@@ -364,7 +364,8 @@ public final class ServerEventHandler extends EventHandler
&& owner.getState() != ServerState.CONNECTING
&& owner.getState() != ServerState.DISCONNECTING) {
throw new IllegalArgumentException("Event called from a parser that " +
- "shouldn't be in use.\nCurrent state: " + owner.getState());
+ "shouldn't be in use.\nState history:\n"
+ + owner.getStatus().getTransitionHistory());
}