Brms with cmdstanr as backend: horseshoe() problem

Interfaces brms
5

Ok, this is related to https://github.com/stan-dev/stanc3/issues/393 which is fixed for the latest version of cmdstan.

The code failed to compile with :

Semantic error in '/tmp/Rtmpp443NJ/model-fdba70fe2956.stan', line 109, column 12 to column 31:
   -------------------------------------------------
   107:    vector[N] mu = Xc * b;
   108:    // priors including all constants
   109:    target += std_normal_lpdf(zb);
                     ^
   110:    target += student_t_lpdf(hs_local | hs_df, 0, 1)
   111:      - rows(hs_local) * log(0.5);
   -------------------------------------------------

Probabilty functions with suffixes _lpdf, _lpmf, _lcdf, and _lccdf, require a vertical bar (|) between the first two arguments.

For now, you can use the release candidate. See how to install here: Cmdstan 2.24 release candidate now available
After Monday this will be what will install with install_cmdstan by default.

With the release candidate I am able to run this.

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