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; * etc/PROBLEMS: Entry about crashes due to anti-virus (bug#57880).

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Eli Zaretskii 2023-06-08 08:30:18 +03:00
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39
etc/PROBLEMS
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@ -2730,6 +2730,45 @@ C-r C-t, to toggle whether C-x gets through to Emacs.
* Runtime problems specific to MS-Windows
** Emacs with native compilation crashes/signals errors accessing *.eln files
This is known to be caused by some flavors of Windows anti-virus
software. The problem could manifest itself in several ways:
. Emacs crashes when it tries to load certain *.eln files
. Emacs signals an error when it tries to load some *.eln files,
claiming they are "not GPL compatible"
. Emacs crashes during GC when it calls unload_comp_unit
This was specifically reported to happen with *.eln files in
directories under the C:\Users directory, which is where Emacs on
Windows places the emulated HOME directory, and thus also the
~/.emacs.d/eln-cache directory holding the *.eln files compiled during
Emacs sessions (as opposed to those that came precompiled and were
installed with the rest of Emacs distribution).
If you cannot disable such anti-virus software or switch to another
one, you could use the following workarounds:
. Define the HOME environment variable to point to a directory
outside of the C:\Users tree, then copy/move your ~/.emacs.d
directory to that new home directory.
. Move all the *.eln files from ~/.emacs.d/eln-cache to a directory
out of the C:\Users tree, and customize Emacs to use that
directory for *.eln files. This requires to add that directory to
the value of native-comp-eln-load-path, and also call the function
startup-redirect-eln-cache in your init file, to force Emacs to
write *.eln files compiled at run time to that directory.
. Delete all *.eln files in your ~/.emacs.d/eln-cache directory, and
then disable run-time native compilation. To disable native
compilation, set the variables native-comp-jit-compilation and
native-comp-enable-subr-trampolines to nil.
. Install Emacs built without native compilation.
With any of the above methods, you'd need to restart Emacs (and
preferably also your Windows system) after making the changes, to have
them take effect.
** Emacs on Windows 9X requires UNICOWS.DLL
If that DLL is not available, Emacs will display an error dialog