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4b3a8cbf61ce4ee19227784ba27c52a9e47774fb

Those have been there since around 2001. They're in a piece of code
that calls get_fullscreen_rect to find the overall screen size, and
then prevents attempts to resize the window larger than that. The
static variables were arranging that we don't have to call
get_fullscreen_rect more than once.
But, firstly, computers are faster 20 years on; secondly, remote
window-resize requests are intentionally rate-limited (as of commit
d74308e90e
), so this shouldn't be the limiting factor anyway; and
thirdly, multi-monitor support has appeared since then, which means
that if the window has been dragged from one monitor to another then
get_fullscreen_rect might _legitimately_ return a different bounding
rectangle when called a second time.
So we should just do the full check every time unconditionally.
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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 . Then, to install in the simplest way on Linux or Mac: cmake --build . --target install On Unix, pterm would like to be setuid or setgid, as appropriate, to permit it to write records of user logins to /var/run/utmp and /var/log/wtmp. (Of course it will not use this privilege for anything else, and in particular it will drop all privileges before starting up complex subsystems like GTK.) The cmake install step doesn't attempt to add these privileges, so if you want user login recording to work, you should manually ch{own,grp} and chmod the pterm binary yourself after installation. If you don't do this, pterm will still work, but not update the user login databases. 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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