R-alpha: R 0.50.a1 problem

[Kurt Hornik]

Here's something really strange.

********************************************************
R> x <- 1:5
R> x
[1] 1 2 3 4 5

R> test1
function (x) 
{
        structure(x, call = sys.call())
}
R> test1(x)
[1] 1 2 3 4 5
attr(,"call")
test1(x)

R> test2
function (x) 
{
        attr(x, "call") <- sys.call()
        x
}
R> test2(x)
Error: stack overflow
********************************************************

Using the attr() form results in an endless loop ...

-k
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