kya8

Undefined std::vector access in Bag::readRecords

1

https://github.com/embarktrucks/embag/blob/74c0b5f9d50bd45bcb6ed8e44718cd60924c13d0/lib/embag.cc#L168-L169 Both `chunk_infos_` and `chunks_` were `reserve()`'d, then accessed without initializing, which is undefined. For `chunk_infos_`: https://github.com/embarktrucks/embag/blob/74c0b5f9d50bd45bcb6ed8e44718cd60924c13d0/lib/embag.cc#L243 And `&chunks_[i]` was accessed before the element was pushed: https://github.com/embarktrucks/embag/blob/74c0b5f9d50bd45bcb6ed8e44718cd60924c13d0/lib/embag.cc#L288-L296 It **does** happen...