Reference invalidated by vector reallocation
Review this C++ particle-buffer code. `first` aliases the front particle so we can keep nudging it while spawning more.
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1std::vector<Particle> particles;
2particles.push_back(makeParticle());
3Particle& first = particles.front(); // hold a reference
4
5for (int i = 0; i < spawnCount; ++i) {
6 particles.push_back(makeParticle()); // may reallocate
7 first.energy *= 0.98f; // decay the held one
8}
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