Pretty stack traces in R

Rprofile-entrace

# Add this to your .Rprofile
options(
  error = quote(rlang::entrace()), 
  rlang__backtrace_on_error = "collapse" # or "branch" or "full"
)

Hi Kirill, this is fantastic!
I'd like to demo this to my team, but I'm having trouble having the trace show in a reprex ... likely the errorHandlers are intercepted somewhere within reprex differently than in the console. Any ideas?

reprex::reprex({
library(rlang)

f <- function(x) {
  x + g(x)
}

g <- function(y) {
  foo <- y * 2
  bar <- paste0(foo, h())
  bar - 100
}

h <- function() {
  stop("error out here", call. = FALSE)
}

f(3.14)
traceback()

#' Much more convenient to set the `errorHandler` intercept in `.Rprofile`
options(error = quote(rlang::entrace()),
        rlang__backtrace_on_error = "collapse")   # or 'full'

f(3.14)
})