[R-pkg-devel] Error creating union class: object ‘.CcompMatrix’ not found

% R-devel --vanilla --quiet
library(Matrix)
setClassUnion("mMatrix", c("Matrix", "matrix"))
Error in get(cname, envir = cwhere, inherits = FALSE) :
  object '.__C__compMatrix' not found
Error in setClassUnion("mMatrix", c("Matrix", "matrix")) :
  unable to create union class:  could not set members "Matrix"
sessionInfo()
R Under development (unstable) (2020-04-07 r78175)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.6 LTS

Matrix products: default
BLAS/LAPACK: /usr/lib/libopenblasp-r0.2.18.so

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

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

other attached packages:
[1] Matrix_1.2-18

loaded via a namespace (and not attached):
[1] compiler_4.1.0  grid_4.1.0      lattice_0.20-41

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Wed, Apr 8, 2020 at 7:35 AM Martin Maechler <maechler at stat.math.ethz.ch>
wrote:
renozao
    on Mon, 30 Mar 2020 21:20:43 +0000 writes:

    > Hi,
    > when R CMD check is run under R-devel (2020-03-29 r78108) I get the
following error at installation:

    > Error in get(cname, envir = cwhere, inherits = FALSE) :
    > object ?.__C__compMatrix? not found
    > Error in setClassUnion("mMatrix", c("Matrix", "matrix")) :
    > unable to create union class:  could not set members "Matrix"

    > This does not happen on R 3.6.3.

    > I tried with Matrix listed in Depends but I still get the same error.

    > Is this linked to some changes in union classes or the Matrix
package?

    > Thank you.

    > Bests,
    > Renaud
Hi Renaud,
One reason you got no response here, is because we don't even
know about which package you are talking.

So there's nothing, anybody can reproduce from your posting.

There have been changes in R's dealing with class unions etc,
notably even *relating* to an earlier bug report on class unions
exactly for such a case which was *triggered* when people built
on such Matrix classes.

But we would really want to be able to reproduce what you are seeing..

Best regards,
Martin Maechler

ETH Zurich, R Core Team *and* maintainer("Matrix")

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[R-pkg-devel] Error creating union class: object ‘.__C__compMatrix’ not found

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[R-pkg-devel] Error creating union class: object ‘.CcompMatrix’ not found