[igraph] graph isomorphism bug

[方君]

Hi

When to check graph iso by calling the following function:
igraph_isomorphic_vf2( &graph_first, &graph_second_plus, NULL, NULL, NULL, 
NULL, &isIso, NULL, NULL, NULL, NULL, NULL );

It is hanging in the above function overnight. It seems a bug in vf2 function.
I dump the two graphs in the attachment.

Thanks,
Jun

graph_first
Description: Binary data

graph_second
Description: Binary data