[Rd] Matrix dimnames crash (PR#13361)

[Prof Brian Ripley]

On Wed, 3 Dec 2008, arnima at u.washington.edu wrote:

> In Windows XP, the matrix() function crashes the program when 'dimnames'
> is an empty list:
>
>   matrix(1:4, nrow=2, dimnames=list())
>   # R has encountered a problem and needs to close ...
>
> This bug is specific to WinXP, as Linux64 handles this situation more
> gracefully:
>
>   matrix(1:4, nrow=2, dimnames=list())
>   Error in matrix(1:4, nrow = 2, dimnames = list()) :
>     invalid type (environment) for 'dimnames' (must be a vector)

Actually no (the reported type is wrong, and my x86_64 Linux system also 
crashes).

This case slips though the error-checking, and I've added a final error 
check that will catch it in R-patched.

Thank you for the report.

>
> Thanks,
> Arni
>
> R 2.8.0-patched on WinXP
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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