Douglas Bates wrote:
I isolated the problem and tested then committed a fix. I am going to
ask Martin to upload the new release as I have gotten out of sync with
some of his recent changes and he will, I hope, reconcile the branches
and trunk. If you need the fixed version immediately, say for
testing, the changes are in the file Matrix/src/chm_common.c You can
visit the SVN archive for the project,
https://r-forge.r-project.org/scm/?group_id=61, click on the link to
Browse Subversion Repository and go to pkg/Matrix/src/chm_common.c
I made the mistake that I chastised others for making, performing an
operation on the result of a call to install and another value that
may have required allocation of memory. The first time install is
called on a particular string it allocates and SEXPREC, which may
cause a garbage collection.
Matrix-for-R-2.13@2659 (0.999375-49) has the problem at a different place:
> pkgname <- "Matrix"
> source(file.path(R.home("share"), "R", "examples-header.R"))
> gctorture(TRUE)
> options(warn = 1)
> options(error=dump.frames)
> library('Matrix')
Loading required package: lattice
Error in regexpr("package:", envName, fixed = TRUE) :
unprotected object (0x2fe5818) encountered (was INTSXP)
Error: package/namespace load failed for 'Matrix'
That aside - with R 2.13 only about a week to go, which version of Matrix will
it ship?
Either way, since this problem causes dependent packages to crash on load, I
have made some local changes to load Matrix only on demand and not on library
initialization, since only one routine needs it. I thought I'd add a warning as
well, but if R crashes, the warning may not come out in time so there is little
incentive of emitting a warning which may not be seen.
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