src/share/vm/logging/log.hpp

*** 86,95 ****
--- 86,97 ----
    // Make sure no more than the maximum number of tags have been given.
    // The GuardTag allows this to be detected if/when it happens. If the GuardTag
    // is not __NO_TAG, the number of tags given exceeds the maximum allowed.
    STATIC_ASSERT(GuardTag == LogTag::__NO_TAG); // Number of logging tags exceeds maximum supported!
  
+   Log() {}
+ 
    static bool is_level(LogLevelType level) {
      return LogTagSetMapping<T0, T1, T2, T3, T4>::tagset().is_level(level);
    }
  
    template <LogLevelType Level>