R devel - May 2018 - valgrind issue in core R 3.5

wrapped <- strwrap("raw")
writeLines(wrapped)
q()

==8699== Conditional jump or move depends on uninitialised value(s)
==8699==    at 0x40310A9: ???
==8699==    by 0xB07F4EF: ???
==8699==    by 0xB07F4EF: ???
==8699==    by 0xB07F4F2: ???
==8699==    by 0x1FFEFFA88F: ???
==8699==

I see this also on Ubuntu 16.04; simpler version is

.Internal(strsplit("raw", "\n[ \t\n]*\n", FALSE, TRUE,
FALSE))

Looks like it is coming form inside a call to pcre_exec, so out of our
control.

Best,

luke

On Fri, 11 May 2018, Joshua N Pritikin wrote:
> wrapped <- strwrap("raw")
> writeLines(wrapped)
> q()
>
> ==8699== Conditional jump or move depends on uninitialised value(s)
> ==8699==    at 0x40310A9: ???
> ==8699==    by 0xB07F4EF: ???
> ==8699==    by 0xB07F4EF: ???
> ==8699==    by 0xB07F4F2: ???
> ==8699==    by 0x1FFEFFA88F: ???
> ==8699=>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu