Predict will fail for particular combinations of cmdstan + cmdstanpy

[carrascomj]

Because of an upstream issue (stan-dev/cmdstanpy#766), predict won't really work for some versions of cmstan and cmdstanpy.

Solution

Either

• pin version of cmdstanpy to one that works with current cmdstan target version; or
• update the minimum required version for cmdstanpy and cmdstan. I'd vouch for pinning cmdstanpy anyways to avoid these issues creeping out in the future.

[carrascomj]

It seems like updating to the latest cmdstan* works for predict but breaks sample. There seems to be a bug in cmdstanpy where, for some state, it never sets adapt_delta to True.