关于break MISSING_BLOCK_LABEL成对出现

源码：

ThreadGate gate;gate = getThreadGate();if (!gate.isActiveThread()) {gate.enter(-1L);evict(((Map) (getFrontMap())));evict(getBackMap());processDeferredEvents(true);gate.exit();}

反编译后：

ThreadGate gate;        gate = getThreadGate();        if(gate.isActiveThread())            break MISSING_BLOCK_LABEL_53;        gate.enter(-1L);        evict(((Map) (getFrontMap())));        evict(getBackMap());        processDeferredEvents(true);        gate.exit();        break MISSING_BLOCK_LABEL_53;        Exception exception;        exception;        gate.exit();        throw exception;