C/igraph 0.9.8

C/igraph 0.9.8 is now released.

The source can be obtained from the GitHub releases page.

This release includes bug fixes and documentation updates only.


  • Assertion failure in igraph_bfs() when an empty roots or restricted vector was provided.
  • igraph_diversity() now returns 0 for degree-1 vertices. Previously it incorrectly returned NaN or ±Inf depending on roundoff errors.
  • igraph_community_walktrap() does not crash any more when provided with
    modularity=NULL and membership=NULL.


  • Documentation improvements.
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