[igraph] max_cliques memory leak

[Alexander Struck]

Dear all,

max_cliques() seems to work fine on smaller graphs. But if I use an large 
undirected graph (4m edges) created with graph_from_edgelist(), my R process 
leaks into memory until all of 256 GB RAM are filled up and then the process 
exits without an error message.
What else should I provide to help the implementer reproduce the problem?

Thanks,
Alexander

> sessionInfo()
R version 3.2.2 (2015-08-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu precise (12.04.4 LTS)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
 [9] 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

other attached packages:
[1] igraph_1.0.1

loaded via a namespace (and not attached):
[1] magrittr_1.5
> gsize(G)
[1] 4071760

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