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aec9901a88
The new general convex path shadow code was checking for duplicate vertices without actually checking if the vectors contained any vertices. Thus, <vector>.back() was being called on empty vectors, which is bad. This led to a crash in G3 as their code is being run with a vector implementation that protects against this, but apparently we do not have such a vector implementation in our local building and testing. No tests because this covered by existing test cases and a new FML_DCHECK, however I'm not sure if we have DCHECKs enabled in CI...?