Moving pointer between vectors in vector causes vector iterators incompatible?

The line that erases from entitiesInCurrentCell has a bug. Correct it by writing.

Erasing from std::vector invalidates iterators. See STL vector::erase Therefore entityIter is invalid after the call to erase. Alas the check "while(entityIter!

= entitiesInCurrentCell.end())" will never become true.

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