The code
library(igraph)
load("iG.Rdata")
iG2 <- is.chordal(iG, newgraph=T)$newgraph
works fine under Windows (any recent version) and under Linux R 2.15.3, but not later versions of R under Linux, including R 3.0.0, where it crashes. Here iG is a fairly large igraph object with 2935 nodes and 4452 edges, but does not appear to be critical (the bug occurs with many similar graphs).
When crashing, I get the following output.
3b30600000-3b307b1000 r-xp 00000000 08:01 10685387 /usr/lib64/libicui18n.so.44.1
3b307b1000-3b309b1000 ---p 001b1000 08:01 10685387 /usr/lib64/libicui18n.so.44.1
3b309b1000-3b309bd000 rw-p 001b1000 08:01 10685387 /usr/lib64/libicui18n.so.44.1
3b30c00000-3b30c0d000 r-xp 00000000 08:01 10683170 /usr/lib64/libgomp.so.1.0.0
3b30c0d000-3b30e0c000 ---p 0000d000 08:01 10683170 /usr/lib64/libgomp.so.1.0.0
3b30e0c000-3b30e0d000 rw-p 0000c000 08:01 10683170 /usr/lib64/libgomp.so.1.0.0
3b31000000-3b31149000 r-xp 00000000 08:01 10688187 /usr/lib64/libxml2.so.2.7.7
3b31149000-3b31349000 ---p 00149000 08:01 10688187 /usr/lib64/libxml2.so.2.7.7
3b31349000-3b31352000 rw-p 00149000 08:01 10688187 /usr/lib64/libxml2.so.2.7.7
3b31352000-3b31354000 rw-p 00000000 00:00 0
3f79e00000-3f79e1f000 r-xp 00000000 08:01 7577606 /lib64/ld-2.13.so
3f7a01e000-3f7a01f000 r--p 0001e000 08:01 7577606 /lib64/ld-2.13.so
3f7a01f000-3f7a020000 rw-p 0001f000 08:01 7577606 /lib64/ld-2.13.so
3f7a020000-3f7a021000 rw-p 00000000 00:00 0
3f7a200000-3f7a391000 r-xp 00000000 08:01 7577607 /lib64/libc-2.13.so
3f7a391000-3f7a591000 ---p 00191000 08:01 7577607 /lib64/libc-2.13.so
3f7a591000-3f7a595000 r--p 00191000 08:01 7577607 /lib64/libc-2.13.so
3f7a595000-3f7a596000 rw-p 00195000 08:01 7577607 /lib64/libc-2.13.so
3f7a596000-3f7a59c000 rw-p 00000000 00:00 0
3f7a600000-3f7a602000 r-xp 00000000 08:01 7577612 /lib64/libdl-2.13.so
3f7a602000-3f7a802000 ---p 00002000 08:01 7577612 /lib64/libdl-2.13.so
3f7a802000-3f7a803000 r--p 00002000 08:01 7577612 /lib64/libdl-2.13.so
3f7a803000-3f7a804000 rw-p 00003000 08:01 7577612 /lib64/libdl-2.13.so
3f7aa00000-3f7aa17000 r-xp 00000000 08:01 7577622 /lib64/libpthread-2.13.so
3f7aa17000-3f7ac16000 ---p 00017000 08:01 7577622 /lib64/libpthread-2.13.so
3f7ac16000-3f7ac17000 r--p 00016000 08:01 7577622 /lib64/libpthread-2.13.so
3f7ac17000-3f7ac18000 rw-p 00017000 08:01 7577622 /lib64/libpthread-2.13.so
3f7ac18000-3f7ac1c000 rw-p 00000000 00:00 0
3f7b600000-3f7b607000 r-xp 00000000 08:01 7577624 /lib64/librt-2.13.so
3f7b607000-3f7b806000 ---p 00007000 08:01 7577624 /lib64/librt-2.13.so
3f7b806000-3f7b807000 r--p 00006000 08:01 7577624 /lib64/librt-2.13.so
3f7b807000-3f7b808000 rw-p 00007000 08:01 7577624 /lib64/librt-2.13.so
3f7ba00000-3f7ba15000 r-xp 00000000 08:01 7577632 /lib64/libgcc_s-4.5.1-20100924.so.1
3f7ba15000-3f7bc14000 ---p 00015000 08:01 7577632 /lib64/libgcc_s-4.5.1-20100924.so.1
3f7bc14000-3f7bc15000 rw-p 00014000 08:01 7577632 /lib64/libgcc_s-4.5.1-20100924.so.1
3f7be00000-3f7be84000 r-xp 00000000 08:01 7577656 /lib64/libm-2.13.so
3f7be84000-3f7c083000 ---p 00084000 08:01 7577656 /lib64/libm-2.13.so
3f7c083000-3f7c084000 r--p 00083000 08:01 7577656 /lib64/libm-2.13.so
3f7c084000-3f7c085000 rw-p 00084000 08:01 7577656 /lib64/libm-2.13.so
3f80600000-3f80621000 r-xp 00000000 08:01 10684042 /usr/lib64/liblzma.so.0.0.0Aborted
Hope this helps.
Seems like this function always crashes:
library(igraph)
iG <- graph.ring(10)
is.chordal(iG, newgraph=