Add missing virtual destructors

vgteam / libhandlegraph

Library for the Handle Graph abstraction

MIT License

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Add missing virtual destructors #30

Closed glennhickey closed 5 years ago

glennhickey commented 5 years ago

Travis caught this in its own cryptic way (weird crashes only on mac/gcc=1), which turned out to come from using a unique_ptr<VectorizableHandleGraph>.