Test suite error on amd64 architecture involving arpack

[jgmbenoit]

The Debian package appears to have building issue on amd64 arch at test time as reported in Debian bug #1054706. This issue seems related to arpack. I can not reproduce the issue on my amd64 box within an up-to-date Debian Sid environment. As such this issue looks reminiscent of the issue #1469 with the igraph C library.

[szhorvat]

I think the link to the Debian bug is not correct, can you fix it?

[jgmbenoit]

On my side the first link leads to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1054706 as expected.

[szhorvat]

That bug is titled:

e-antic: FTBFS: ../../../libeantic/test/main.cpp:4:10: fatal error: catch2/catch.hpp: No such file or directory

Is this what you meant to post? I don't see any mention of igraph.

[jgmbenoit]

Indeed. I am sorry for that. The issue is Debian bug #1054721. Actually the issue resolved by itself.

[szhorvat]

Make sure you are testing with ARPACK 3.9.1 installed, and if you can reproduce it, even intermittently, let us know.

This problem may be caused by a bug ARPACK 3.9.0. It is going to be random, and we don't have control over the randomness (ARPACK won't let us set a seed). So to make sure, you'd have to run the test multiple times.

[szhorvat]

We saw something similar on conda-forge actually, with an older ARPACK that doesn't have the 3.9.0 bug ... conda-forge/python-igraph-feedstock#77

[jgmbenoit]

According to the last changelog of the Debian ARPACK package the test occured with version 3.9.1. Whatever, with respect to your comments, I reopened the Debian bug and I changed its title so that people can feed it.