[Rd] R crashes when printing a named numeric vector of a specific class - Bug?
Basil Abou El-Komboz
Basil.Abou-El-Komboz at stat.uni-muenchen.de
Tue Sep 11 16:53:45 CEST 2012
Dear useR's,
today I stumbled over an interesting phenomenon: First, I created a
named numeric vector with a certain class and several attributes via the
structure() function. After that, I implemented a simple print method
for this class. When calling this function it produces an endless loop
of print calls until R crashes. :/
What is going on here? Is this a bug or have I done something completely
wrong? :)
Below is a minimal example which reproduces the behavior. Be careful
when calling foo() as this automatically calls print.bar() which causes
R to crash (at least on my PC, see further informations about my system below.)
Greetings,
Basil
--------------------------------------------------
Minimal example:
foo <- function () {
x <- c("A" = 1.3, "B" = 0.7, "C" = -0.3)
structure(x, class = "bar")
}
print.bar <- function (x, ...) {
print(x, ...)
}
--------------------------------------------------
Further informations about my system:
> version
_
platform x86_64-unknown-linux-gnu
arch x86_64
os linux-gnu
system x86_64, linux-gnu
status
major 2
minor 15.1
year 2012
month 06
day 22
svn rev 59600
language R
version.string R version 2.15.1 (2012-06-22)
nickname Roasted Marshmallows
> sessionInfo()
R version 2.15.1 (2012-06-22)
Platform: x86_64-unknown-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
[6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=C LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_2.15.1 tools_2.15.1
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