shinrich commented on pull request #6241:
URL: https://github.com/apache/trafficserver/pull/6241#issuecomment-769870712


   initializing od to nullptr in the definition of CacheVC (P_CacheInternal.h), 
seems to have solved the start up crash.
   
   @SolidWallOfCode pointed out that the constructor 0's "part" of the new 
object.  Is it possible that sizeof(CacheVC) changes with this PR?  I don't see 
how, but perhaps I'm missing something.  Otherwise, I don't see how this 
initialization logic differs with and without this patch.
   
   ```
   CacheVC::CacheVC()
   {
     size_to_init = sizeof(CacheVC) - (size_t) & ((CacheVC *)nullptr)->vio;
     memset((void *)&vio, 0, size_to_init);
   }
   ```


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