R-alpha: cbind/memory-bug, (was Re: contr.helmert bug)
Peter Dalgaard BSA
07 May 1997 17:25:49 +0200
Thomas Lumley <firstname.lastname@example.org> writes:
> I have a probably related problem. Sporadically, an attempt to do
> or similar subsetting on a 3-d matrix causes a segfault at line 83 of
> attrib.c. In a previous version this happened reliably when dimensions
> were lost from multi-d arrays and was due to incorrect handling of the
> dimnames attributes which crashed attrib.c at that point when the dimnames
> were accessed.
> Is the same sort of thing happening again?
Not at all unlikely. As far as I can see, this doesn't really have
anything to do with contr.helmert, but with cbind, dimnames, and
garbage collection. Contr.helmert only comes in due to the fact that
it provokes a garbage collection at a critical time. Your examples
don't involve the garbage collector, but it might still tickle the
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
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