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A user reports that if you have MIT KfW loaded, and your PuTTY session terminates without the PuTTY process exiting, and you select 'Restart Session' from the menu, then a crash occurs inside the Kerberos library itself. Scuttlebutt on the Internet suggested this might be to do with unloading and then reloading the DLL within the process lifetime, which indeed we were doing. Now we avoid doing that for the KfW library in particular, by keeping a tree234 of module handles marked 'never unload this'. This is a workaround at best, but it seems to stop the problem happening in my own tests.
This is the README for PuTTY, a free Windows and Unix Telnet and SSH client. PuTTY is built using CMake <https://cmake.org/>. To compile in the simplest way (on any of Linux, Windows or Mac), run these commands in the source directory: cmake . cmake --build . Documentation (in various formats including Windows Help and Unix `man' pages) is built from the Halibut (`.but') files in the `doc' subdirectory using `doc/Makefile'. If you aren't using one of our source snapshots, you'll need to do this yourself. Halibut can be found at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>. The PuTTY home web site is https://www.chiark.greenend.org.uk/~sgtatham/putty/ If you want to send bug reports or feature requests, please read the Feedback section of the web site before doing so. Sending one-line reports saying `it doesn't work' will waste your time as much as ours. See the file LICENCE for the licence conditions.
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