No Implementation of Constructor in FNetBitReader

It seems that in CoreNet.h, there are two constructors declared. However, only the first constructor is defined in CoreNet.cpp.

If you look in CoreNet.h, you'll notice that

FNetBitReader( int64 InMaxBits );

has a warning:

1. Open UE4.sln
2. Navigate to CoreNet.h & CoreNet.cpp
3. Notice the following constructor declarations in CoreNet.h

    FNetBitReader( UPackageMap* InPackageMap=NULL, uint8* Src=NULL, int64 CountBits=0 );
     FNetBitReader( int64 InMaxBits );

4. Navigate to CoreNet.cpp and CTRL+F search for FNetBitReader

Result: Notice that the constructor declared second in the .h file is not defined in the .cpp

Expected: The function would be defined in the .cpp