[issue30484] Garbage Collector can cause Segfault whilst iterating dictionary items

New submission from Jim Wright: We discovered this issue whilst using h5py (HDF5 python library) under python 3.5.2 on Ubuntu 16.04.2 x86_64. The construct used is very dubious, and I will separately be raising an issue with the h5py team. However I thought you might like to know there is a

[issue30484] Garbage Collector can cause Segfault whilst iterating dictionary items

Jim Wright added the comment: Hi Jelle, I think you're right about master; it looks like this very recent change: https://github.com/python/cpython/pull/1657 could have fixed the issue, but I didn't find it whilst doing my original investigation of the issue o