segmentation fault in integrate (PR#812)

I tried to integrate numerically a function wich is similar to the
following:

dummy <- function(x) { exp(-1*x) * dnorm(x) }
dummy(-100)

[1] 0

dummy(-1000)

[1] NaN

dummy(-10000)

[1] NaN

If I choose the lower boundary to be too small integrate causes a
segmentation fault:

library(integrate)
integrate(dummy, -100, 0)$value

[1] 1.387143

integrate(dummy, -1000, 0)$value

[1] NaN
Warning message:
Ifail=1, maxpts was too small. Check the returned relerr! in: adapt(1,
lower, upper, minpts, maxpts, functn, eps, ...)

integrate(dummy, -10000, 0)$value

Segmentation fault

integrate(dummy, -1000000, 0)$value

dummy <- function(x) { a <-  exp(-1*x) * dnorm(x); ifelse(is.na(a), 0,

integrate(dummy, -100, 0)$value

integrate(dummy, -1000, 0, maxpts=1000)$value

I'm running R.1.2.0 on Debian Linux.

Regards
Achim

version

         _                
platform i686-pc-linux-gnu
arch     i686             
os       linux-gnu        
system   i686, linux-gnu  
status                    
major    1                
minor    2.0              
year     2000             
month    12               
day      15               
language R   



-------------------------

Achim Zeileis
Institut für Statistik
Technische Universität Wien

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