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The language is pure, lazy, and has no loops. Every iteration is recursion, and recursion costs stack frames. Since Nix 2.20, the evaluator caps call depth at 10,000 (configurable via max-call-depth, but the default is what you'll hit). Before 2.20, the limit was whatever your OS allocated for the process stack: non-deterministic across machines, occasionally baffling to debug. Tail-call optimization would help. There's even a FIXME comment in ExprApp::eval() acknowledging it. But the evaluator's structure (a local variable that stays live across the recursive eval call) prevents the tail position from being optimized, and nobody has restructured the code. Tvix, the Rust-based evaluator, handles TCO in many cases. The reference C++ evaluator doesn't.，这一点在新收录的资料中也有详细论述
。关于这个话题，新收录的资料提供了深入分析
Артём Верейкин (Ночной линейный редактор)，这一点在PDF资料中也有详细论述
结合这个案例和这些诈骗手法，马上金融给大家整理了几个防范要点：