in hexrays just try to change prototype by press Y at any std::istream… of std::ios::base…
ida crash
Please provide a sample idb for reproducing.
Your reference is SUPPORT-5151.
Thank you! It seems the issue happens on imported C++ functions. For now please avoid using Y on them.
at the moment I still can’t switch to the new ida 9.1 from 8.3
due to all sorts of differences in its operation and such bugs