# C/igraph 0.10.9

**URL:** <https://igraph.discourse.group/t/c-igraph-0-10-9/1739>\
**Category:** Announcements\
**Tags:** C\
**Created:** [2 February 2024 15:34 UTC](https://igraph.discourse.group/t/c-igraph-0-10-9/1739 "2024-02-02T15:34:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tamas](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/tamas/32/1261_2.png) [@tamas](https://igraph.discourse.group/u/tamas)\
**Post date:** [2 February 2024 15:34 UTC](https://igraph.discourse.group/t/c-igraph-0-10-9/1739/1 "2024-02-02T15:34:25Z")

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[C/igraph](https://igraph.org/c/) 0.10.9 is now released. As usual, the source can be obtained from [the GitHub releases page](https://github.com/igraph/igraph/releases/tag/0.10.9). This is a maintenance release bringing multiple fixes, but also new experimental functions for checking whether a graph is biconnected and for generating bipartite graphs from bidegree sequences. Updating is recommended for all users of igraph 0.10. The full list of changes is below.

* * *

### Added

- `igraph_is_biconnected()` checks if a graph is biconnected.
- `igraph_igraph_realize_bipartite_degree_sequence()` constructs a bipartite graph that has the given bidegree sequence, optionally ensuring that it is connected (PR #2425 by Lára Margrét Hólmfríðardóttir @larah19).

### Fixed

- More robust error handling in HRG code.
- Fixed infinite loop in `igraph_hrg_sample_many()`.
- `igraph_community_fastgreedy()` no longer crashes when providing a modularity vector only, but not a merges matrix of membership vector.
- The graph property cache was not initialized correctly on systems where the size of `bool` was not 1 byte (#2477).
- Compatibility with libxml2 version 2.12 (#2442).

### Deprecated

- The macro `STR()` is deprecated; use the function `igraph_strvector_get()` instead.

### Other

- Performance: Reduced memory usage and improved initialization performance for `igraph_strvector_t`.
- Performance: Improved cache use by `igraph_is_bipartite()`.
- The documentation is now also generated in Texinfo format.
- Documentation improvements