Package coverage fails with uninformative error

Package development
1

I'm trying to add test coverage to a package (source code here). I'm getting the following error when running covr::package_coverage():

covr::package_coverage()
#> Error in vapply(x, function(xx) c(xx$srcref, xx$value), numeric(9), USE.NAMES = FALSE) : 
#>   values must be length 9,
#>  but FUN(X[[233]]) result is length 8

Unfortunately the error message doesn't tell me much about which part of my code is causing the problem. I'm using covr version 3.6.4.

For information, my tests use many callr subprocesses and temporary files (in case that makes it harder for covr to inspect the package).

Any help is welcome.

2

This often happens when a subprocess is killed, and it cannot write out the coverage data properly, resulting a broken RDS file, which makes covr error.

2 Likes
3

Is there anything I can do to prevent this? Can it be caused by a bug in my code? For example, the tests that use a subprocess fail when I explicitly import the functions to test with ::. It works in real life so I know there's a bug somewhere, can't determine where though.