Hi all,
One of my packages is failing on CRAN in R-devel [1], and I was requested
to fix it. However, it is *only* failing on one specific configuration,
'r-devel-linux-x86_64-debian-gcc'. All other combinations — clang on
Debian, both clang and GCC on Fedora, and Windows — keep running just fine.
As my package is not using compiled code or anything OS-specific, I am at a
loss to explain this highly specific failure. Before attempting to build a
container image with this specific configuration locally (… are these
configurations available as ready-made images?), I wanted to check if there
was an obvious change in R-devel which might explain the issue.
There are two failures, both with the same error message: “cannot change
value of locked binding for '*tmp*'”. My package’s code isn’t attempting to
directly change `*tmp*`, but it is using eval() to perform subset
assignment to a complex expression inside an active binding. Here’s a
minimal code snippet that *should* be equivalent to one of the two
failures, and which should therefore also fail (in the last line):
x = data.frame(a = 1 : 2, b = c('a', 'b'))
f = function (value) {
if (missing(value)) {
evalq(x[1L, ], .GlobalEnv)
} else {
assign_expr = substitute(x[1L, ] <- value, list(value = value))
eval(assign_expr, .GlobalEnv)
}
}
makeActiveBinding('ax', f, .GlobalEnv)
ax[1L] = 3L
I had a look at the changes in in R-devel, but I couldn’t find anything
obviously relevant. In particular, the code of R_MakeActiveBinding() hasn’t
been touched in literally decades, and similar for the code that (as far as
I understand) performs subset assignment, applydefine().
Does anybody have an idea what might be going on here, or how to debug this
issue?
Cheers,
Konrad
[1] https://cran.r-project.org/web/checks/check_results_aka.html
--
Konrad Rudolph
[[alternative HTML version deleted]]
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-package-devel
