Announcing HDF5 for Python (h5py) 2.2.1 ======================================= The h5py team is happy, in a sense, to announce the availability of h5py 2.2.1. This release fixes a critical bug reported by Jim Parker on December 7th, which affects code using HDF5 compound types. We recommend that all users of h5py 2.2.0 upgrade to avoid crashes or possible data corruption. About h5py, downloads, documentation: http://www.h5py.org Scope of bug ------------ The issue affects a feature introduced in h5py 2.2.0, in which HDF5 compound datasets may be updated in-place, by specifying a field name or names when writing to the dataset:

...

...

dataset['field_name'] = value

Under certain conditions, h5py can supply uninitialized memory to the HDF5 conversion machinery, leading (in the case reported) to a segmentation fault. It is also possible for other fields of the type to be corrupted. This issue affects only code which updates a subset of the fields in the compound type. Programs reading from a compound type, writing all fields, or using other datatypes, are not affected; nor are versions of h5py prior to 2.2.0. More information ---------------- Github issue: https://github.com/h5py/h5py/issues/372 Original thread: https://groups.google.com/forum/#!topic/h5py/AbUOZ1MXf3U Thanks also to Christoph Gohlke for making Windows installers available on very short notice, after a glitch in the h5py build system.