print("file is {size} bytes");
task_type=TaskType.CAUSAL_LM,
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Here's what makes this insidious: the trampoline runs fine. genericClosure's C++ loop processes all 65,000 steps without complaint. The failure happens when you try to use the result. Forcing that final total unwinds the entire thunk chain as recursive C++ forceValue calls, rebuilding exactly the stack depth you thought you'd eliminated. The error is stack overflow (possible infinite recursion), not max-call-depth exceeded: this is the C++ call stack, not the Nix evaluator's depth limit. A simple integer counter where the comparison is the state (n: if n = N then ...) would survive, because the comparison forces the state at every step and call-by-need memoization prevents the chain. The trap springs when your state has components the step function doesn't touch.
实际上，机器人创业热的另一个底层原因，是“大模型+人形机器人”的具身智能技术路线上，对比大模型研发需要海量算力、长期训练、严苛评测的高门槛，人形机器人赛道的“组装式创业”捷径太过明显，因此投机门槛被刻意拉低，从而导致乱象丛生。
不再单纯依赖“看别人做什么，我就做什么”的滞后策略，盼盼开始尝试走进渠道的最前端——直接对话消费者。