[igraph] igraph crash on windows xp 64 bit system/update

[Gang Su]

After looking into the issue it seems that it's some bug with 
graph.edgelist function(i am not sure where is wrong).

if (is.character(el)) {
            names <- unique(as.character(t(el)))
            ids <- seq(names) - 1
            names(ids) <- names

#it fails right there, at the graph function
res <- graph(unname(ids[t(el)]), directed = directed)
            rm(ids)
            V(res)$name <- names
        }

The bug is:
If I use graph.data.frame, it works fine.
If I use numeric ids for edgelist, it works fine.
If I use character ids for edgelist under 1500~2000 edges, it's fine.

If I load the entire dataset with graph.edgelist, it crashes, but it's 
working with graph.data.frame.

I don't know whether this is a R bug or igraph bug.


Gang



-------------------
Hi dear developers,

I have just migrated my working environment to a 64 bit system.
One weird issue i encountered is i tried to initialize a graph with
around 5k edges.
However, R will crash if I load around 3k edges.
For example,
if I use graph(el[1:1000,]), it is fine
if I use graph(el[1:3000,]), R will crash

I am now using R 2.6.2 with igraph. I not sure whether this is a igraph
bug or R bug for the 64 bit system. If you have used igraph on windows
XP 64 bit system please help!
thank you very much!

Gang