R-alpha: Transposition bug
Peter Dalgaard BSA
p.dalgaard@kubism.ku.dk
09 Jun 1997 23:13:42 +0200
Shortest program to crash R?
> t(table(1))
Floating point exception (core dumped)
One-dimensional tables don't act like vectors, obviously. The crash
comes from an integer divide-by-zero (yup, that causes a SIGFPE) in
#0 0x8058e0b in do_transpose (call=0x4050c1e4, op=0x401c65fc,
args=0x4050c1bc, rho=0x4050e4e4) at array.c:545
545 INTEGER(r)[i] = INTEGER(a)[(i / ncol)
+ (i % ncol) * nrow];
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907
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