Error with add_criterion(..., "loo")

[mtenan]

Possibly related to the issue @avehtari and I are troubleshooting with loo?

See

Add_criterion with moment_match=TRUE failing even when save_pars(all=TRUE) was set during model fit

Here is the reprex. Admittedly, I can only get it to cause the error on my Mac and not the Windows one, which has me completely baffled. (both machines still error with the original code) Are you able to replicate the error, @avehtari? library(brms) #make the data out1 <- c(0.4259, 0.42855, 0.4193, 0.3835, 0.348, 0.5182, 0.52025, 0.44115, 0.4603, 0.44805, 0.3567857, 0.3799, 0.50925, 0.4768, 0.56815, 0.3948421, 0.42665, 0.37795, 0.36645, 0.34565, 0.7618947, 0.8046667, 0…