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V článku dosť výrazne chýba informácia, že pád spôsobilo neošetrené pretečenie pamäte v Ruste, v kóde, ktorý predtým dlhé roky fungoval a potom bol prepísaný do Rustu.

Each module running on our proxy service has a number of limits in place to avoid unbounded memory consumption and to preallocate memory as a performance optimization (...) Again, the limit exists because for performance reasons we preallocate memory for the features.

When the bad file with more than 200 features was propagated to our servers, this limit was hit — resulting in the system panicking. The FL2 Rust code that makes the check and was the source of the unhandled error is shown below: (...)

This resulted in the following panic which in turn resulted in a 5xx error.