"bad error message" redux

[DarwinAwardWinner]

I have previously reported an issue about getting "bad error message", which was fixed, but now I have run into another instance of it. Here is some code that produces the error for me:

library(assertthat)
library(fs)
# Works fine (assertion fails normally)
assert_that(all(file_exists(c("/this/path/does/not/exist/fileA", "/this/p", "C"))))
# One char longer: "bad error message"
assert_that(all(file_exists(c("/this/path/does/not/exist/fileA", "/this/pa", "C"))))

## Returns 1 element
see_if(all(file_exists(c("/this/path/does/not/exist/fileA", "/this/p", "C"))))
## One char longer: Returns 2 elements
see_if(all(file_exists(c("/this/path/does/not/exist/fileA", "/this/pa", "C"))))

As shown by the see_if calls at the bottom, the problem coincides with the vector length that causes see_if to return a vector of length greater than 1.