rjmccall added a comment. Hmm. Sema is lazy about actually creating implicit destructor declarations, but it's supposed to only do it whenever the destructor is actually used for something. I suspect that Sema just thinks that nothing is using c::~c, because the only thing that does use it is d::~d, which is inline and has no apparent users. But from the stack trace, it seems that IRGen is in fact emitting d::~d. So the question is, why is IRGen emitting d::~d? Because AFAIK a non-array new-expression never requires the destructor to exist.
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