update NEWS, switch back to cmdstanr default optimization

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: dynamite
 Title: Bayesian Modeling and Causal Inference for Multivariate
     Longitudinal Data
-Version: 1.4.8
+Version: 1.4.9
 Authors@R: c(
     person("Santtu", "Tikka", email = "santtuth@gmail.com", 
            role = c("aut", "cre"), comment = c(ORCID = "0000-0003-4039-4342")),

NEWS.md

@@ -1,3 +1,8 @@
+# dynamite 1.4.9
+  * Added option to input custom model code for `dynamite` which can be used to 
+    tweak some aspects of the model (no checks on the compatibility with the post processing are made).
+  * Changed the default optimization level for `cmdstanr` backend to `O0`, as the `O1` is not necessarily stable in all cases.
+
 # dynamite 1.4.8
 
   * Made several performance improvements to data parsing.

R/dynamite.R

@@ -52,7 +52,8 @@
 #' @param stanc_options \[`list()`]\cr This is the `stanc_options` argument
 #'   passed to the compile method of a `CmdStanModel` object via
 #'   [cmdstanr::cmdstan_model()] when `backend = "cmdstanr"`.
-#'   Defaults to `list("O1")` to enable level one compiler optimizations.
+#'   Defaults to `list("O0")`. To enable level one compiler optimizations,
+#'   use `list("O1")`.
 #' @param threads_per_chain \[`integer(1)`]\cr A Positive integer defining the
 #'   number of parallel threads to use within each chain. Default is `1`. See
 #'   [rstan::rstan_options()] and [cmdstanr::sample()] for details.
@@ -157,7 +158,7 @@
 dynamite <- function(dformula, data, time, group = NULL,
                      priors = NULL, backend = "rstan",
                      verbose = TRUE, verbose_stan = FALSE,
-                     stanc_options = list("O1"),
+                     stanc_options = list("O0"),
                      threads_per_chain = 1L, grainsize = NULL,
                      custom_stan_model = NULL, debug = NULL, ...) {
   dynamite_check(