Looks like https://github.com/opencollab/arpack-ng/issues/142 ?
S On 27/07/2018 01:34, Andreas Tille wrote: > Hi, > > just forwarding the suspicion of igraph upstream that the problem is > caused by arpack. I'm tempted to reassign bug #902760 but I'd like > to hear your opinion first. > > Kind regards > > Andreas. > > ----- Forwarded message from Tamás Nepusz <notificati...@github.com> ----- > > Date: Thu, 26 Jul 2018 11:19:03 -0700 > From: Tamás Nepusz <notificati...@github.com> > To: igraph/igraph <igr...@noreply.github.com> > Cc: Andreas Tille <ti...@debian.org>, Author <aut...@noreply.github.com> > Subject: Re: [igraph/igraph] Testsuite fails with ARPACK 3.6 (#1107) > > Okay, I am pretty certain that this is an inherent issue with ARPACK 3.6; the > same problem can also be triggered in GNU Octave (4.4.0) when linked with > ARPACK 3.6 (I tried it on a Mac with Homebrew). The code below produces the > PageRank matrix of the graph from the igraph test case: > > ``` > octave:1> m = ones(11, 11) * 0.15 / 11; > octave:2> m(1, 2:11) += 0.85; > octave:3> m(2:11, 1) = (1 - m(1, 1)) / 10; > ``` > > and it blows up exactly the same way: > > ``` > octave:4> [v, lambda] = eigs(m, 1) > error: __eigs__: eigs: error -9999 in dnaupd > error: called from > eigs at line 285 column 18 > ``` > > I'll file a bug report to `arpack-ng`. > -- debian-science-maintainers mailing list debian-science-maintainers@alioth-lists.debian.net https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/debian-science-maintainers
