Three New Debugging Aids in knitr

Note

This is one of a few posts on new features from a recent four-day knitr backlog sprint; see that post for the full details of the sprint.

When a document fails to knit, the worst part isn’t the error—it’s the scavenger hunt. Which line, in which chunk, produced this message? In a long report with dozens of chunks, that hunt can eat more time than the actual fix. Three additions this cycle are all aimed at the same thing: telling you where a problem came from, …