[Rd] segfault when applying strange coercion (PR#2923)

[Peter Dalgaard BSA]

Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk> writes:

> ligges at statistik.uni-dortmund.de writes:
> 
> > I made a mistake -- and R crashed. A (more or less) reproducible example 
> > seems to be:
> > 
> >    x <- matrix(nrow=20000, ncol=20)
> >    x$any <- numeric(0)
> > 
> > It is possible to crash R by executing these lines several times (1 - 
> > 20) on Windows as well as on Solaris (might be related to PR#2880 - 
> > let's call it "non-existing list elements")
> 
> Linux too: (r-devel)

Fixed now in r-patched. Thanks to Rob for reminding me of Luke's
REPROTECT mechanism.
        
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   O__  ---- Peter Dalgaard             Blegdamsvej 3  
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