On Friday, 16 December 2016 at 18:29:33 UTC, Ilya Yaroshenko wrote:
Undefined symbols for architecture x86_64:
  "__D14TypeInfo_Class6__vtblZ", referenced from:
      __D8cppclass2Hw7__ClassZ in cppclass-7ed89bd.o

By using typeid you request the class' TypeInfo, and it pulls quite a lot.

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