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DIckey Fuller test breaks on constant values

DIckey Fuller test breaks on constant values: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Describe the bug Dickey-Fuller test gives error when testing with constant values. Code Sample, a copy-pastable example if possible RuntimeWarning: divide by zero encountered in log…

The task

Describe the bug Dickey-Fuller test gives error when testing with constant values. Code Sample, a copy-pastable example if possible RuntimeWarning: divide by zero encountered in log llf = -nobs2np.log(2np.pi) - nobs2np.log(ssr / nobs) - nobs2 Expected Output I have expected…

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.