Back trace the expression evaluated when a condition was caught
backtrace(future, envir = parent.frame(), ...)
A future with a caught condition.
the environment where to locate the future.
Not used.
A list with one call.
It is currently not possible to infer the full call stack prior to
when an error occurred. It is only possible to get the call that produced
the call.
This is a limitation of tryCatch()
used
internally for evaluating the future expression.