Set the error global option to quote(rlang::entrace()) to transform base errors to rlang errors. These enriched errors include a backtrace. The RProfile is a good place to set the handler.

entrace() also works as a calling handler, though it is often more practical to use the higher-level function with_abort().

entrace(cnd, ..., top = NULL, bottom = NULL)

Arguments

cnd

When entrace() is used as a calling handler, cnd is the condition to handle.

...

Unused. These dots are for future extensions.

top

The first frame environment to be included in the backtrace. This becomes the top of the backtrace tree and represents the oldest call in the backtrace.

This is needed in particular when you call trace_back() indirectly or from a larger context, for example in tests or inside an RMarkdown document where you don't want all of the knitr evaluation mechanisms to appear in the backtrace.

bottom

The last frame environment to be included in the backtrace. This becomes the rightmost leaf of the backtrace tree and represents the youngest call in the backtrace.

Set this when you would like to capture a backtrace without the capture context.

Can also be an integer that will be passed to caller_env().

See also

with_abort() to promote conditions to rlang errors.

Examples

if (FALSE) { # Not run # Set the error handler in your RProfile like this: if (requireNamespace("rlang", quietly = TRUE)) { options(error = rlang::entrace) } }