[Bioc-devel] Bug in setdiff() for signature 'IRangesList, IRangesList'?

Leonard Goldstein goldstein.leonard at gene.com
Mon Nov 7 18:46:05 CET 2016

Dear Hervé et al.

I noticed that setdiff(x, y) where 'x' is an IRangesList containing an
empty IRanges results in an error (see below). I would have expected the
function to return the IRangesList with an empty IRanges?

Many thanks for your help.


> x <- IRangesList(IRanges())
> y <- IRangesList(IRanges())
> setdiff(x, y)
Error in ans[] <- x : replacement has length zero
> sessionInfo()
R version 3.3.0 Patched (2016-05-09 r70594)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Red Hat Enterprise Linux Server release 6.6 (Santiago)

 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets
[8] methods   base

other attached packages:
[1] IRanges_2.8.0       S4Vectors_0.12.0    BiocGenerics_0.20.0

loaded via a namespace (and not attached):
[1] zlibbioc_1.20.0 XVector_0.14.0

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