Segfault in igraph

[ntfrgl]

With igraph version 0.7.1, I get the following error. How about other machines?

core.network.Network.SmallTestNetwork().get_pagerank():

[:] *** Process received signal ***
[:] Signal: Segmentation fault (11)
[:] Signal code: Address not mapped (1)
[:] Failing at address: 0x7fc23f506255
[:] [ 0] /usr/lib/libpthread.so.0(+0xf4b0)[0x7fc21d53f4b0]
[:] [ 1] /usr/lib/libpython2.7.so.1.0(PyObject_IsTrue+0x1f)[0x7fc21d7d508f]
[:] [ 2] /usr/lib/python2.7/site-packages/igraph/_igraph.so(igraphmodule_Graph_personalized_pagerank+0x45b)[0x7fc2136f001b]
[:] [ 3] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x56c9)[0x7fc21d82f669]
[:] [ 4] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [ 5] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4f17)[0x7fc21d82eeb7]
[:] [ 6] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [ 7] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4f17)[0x7fc21d82eeb7]
[:] [ 8] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [ 9] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7fc21d830a69]
[:] [10] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x60f9)[0x7fc21d830099]
[:] [11] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [12] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4f17)[0x7fc21d82eeb7]
[:] [13] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [14] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4f17)[0x7fc21d82eeb7]
[:] [15] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [16] /usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4f17)[0x7fc21d82eeb7]
[:] [17] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x830)[0x7fc21d830970]
[:] [18] /usr/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7fc21d830a69]
[:] [19] /usr/lib/libpython2.7.so.1.0(+0xfbeaf)[0x7fc21d849eaf]
[:] [20] /usr/lib/libpython2.7.so.1.0(PyRun_FileExFlags+0x72)[0x7fc21d84b0d2]
[:] [21] /usr/lib/libpython2.7.so.1.0(PyRun_SimpleFileExFlags+0xe7)[0x7fc21d84c2d7]
[:] [22] /usr/lib/libpython2.7.so.1.0(Py_Main+0xc7a)[0x7fc21d85d66a]
[:] [23] /usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7fc21d1a2000]
[:] [24] python2[0x40073e]
[:] *** End of error message ***
zsh: segmentation fault (core dumped)  python2 pyunicorn/core/network.py

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Originally reported by: ntfrgl Originally created on: 2014-06-17

[ntfrgl]

Problem does not occur using igraph 0.6.

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Original comment by: Jonathan Donges Original comment on: 2014-06-26

[ntfrgl]

Problem also does not occur for me using igraph 0.7.0.

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Original comment by: Jonathan Donges Original comment on: 2014-06-26

[ntfrgl]

Boyan: this must be an igraph internal error in igraph 0.7.1. Possibly because this is a development version and not an official release?

I suggest that you send a request to the igraph mailing list.

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Original comment by: Jonathan Donges Original comment on: 2014-06-26

[ntfrgl]

For me, it also works in igraph 0.7.1.

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Original comment by: Jonathan Donges Original comment on: 2014-06-26

[ntfrgl]

Reported at https://github.com/igraph/igraph/issues/636.

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Original comment by: ntfrgl Original comment on: 2014-06-26

[ntfrgl]

Any response on the igraph issues list?

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Original comment by: Jonathan Donges Original comment on: 2014-09-25

[ntfrgl]

OK, now there is a response from Tamas from August 14:

_Found a workaround (although the cause is still not clear): just call personalizedpagerank() instead of pagerank().

Boyan: Can you please test if this workaround works for you?

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Original comment by: Jonathan Donges Original comment on: 2014-09-25

[ntfrgl]

Works for me. Should I replace this method in pyunicorn?

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Original comment by: ntfrgl Original comment on: 2014-09-25

[ntfrgl]

Yes, please.

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Original comment by: Jonathan Donges Original comment on: 2014-09-25

[ntfrgl]

Resolved in commit 0fdac91.

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Original comment by: Jonathan Donges Original comment on: 2014-09-26

[ntfrgl]

Fixed upstream, will be included in igraph 0.7.2.

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Original comment by: ntfrgl Original comment on: 2014-10-02