Error location for snapshot tests with error = TRUE

[krlmlr]

In current tibble I'm seeing:

───────────────────────────────────────────────────────
Failure (snapshot.R:67:5): output test
`{ ... }` threw an unexpected error.
Message: `x` must not have more than one dimension. `length(dim(x))` must be zero or one, not 4.
Class:   tibble_error_enframe_has_dim/tibble_error/rlang_error/error/condition
Backtrace:
 1. tibble::enframe(Titanic)
───────────────────────────────────────────────────────

The snapshot.R:67:5 is not particularly helpful here.

[krlmlr]

Tibble had code of the form

test_that("desc", expect_snapshot({
}))

TIL this is a bad idea (and why), the pull request adds a warning.