[igraph] communitity.to.membership crashes for large graphes

[Julian Hagenauer]

Hi,
i run the following commands:

library(igraph)
g<-random.graph.game(100,0.1)
c<-fastgreedy.community(g)
community.to.membership(g,c$merges,steps=50)

result:

*** glibc detected *** /usr/lib/R/bin/exec/R: double free or corruption
(!prev): 0x00000000014960d0 *** ======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x75b46)[0x7fc3f6b97b46]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7fc3f6b9c87c]
/home/julian/R/x86_64-pc-linux-gnu-library/2.15/igraph/libs/igraph.so(igraph_vector_destroy+0x11)[0x7fc3f2271701]
/home/julian/R/x86_64-pc-linux-gnu-library/2.15/igraph/libs/igraph.so(R_igraph_community_to_membership+0xee)[0x7fc3f2219ede]
/usr/lib/R/lib/libR.so(+0xa99e8)[0x7fc3f737c9e8]
/usr/lib/R/lib/libR.so(Rf_eval+0x690)[0x7fc3f73b1cf0]
/usr/lib/R/lib/libR.so(+0xe1990)[0x7fc3f73b4990]
/usr/lib/R/lib/libR.so(Rf_eval+0x4de)[0x7fc3f73b1b3e]
/usr/lib/R/lib/libR.so(Rf_applyClosure+0x319)[0x7fc3f73b5cc9]
/usr/lib/R/lib/libR.so(Rf_eval+0x3d8)[0x7fc3f73b1a38]
/usr/lib/R/lib/libR.so(Rf_ReplIteration+0x22b)[0x7fc3f73e6aab]
/usr/lib/R/lib/libR.so(+0x113ce8)[0x7fc3f73e6ce8]
/usr/lib/R/lib/libR.so(run_Rmainloop+0x50)[0x7fc3f73e71f0]
/usr/lib/R/bin/exec/R(main+0x1b)[0x4008db]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)[0x7fc3f6b40ead]
/usr/lib/R/bin/exec/R[0x40090d]


Can this considered a bug, or did i miss something?

Thank you,
Julian