Add that /var/run
or subpaths cannot be exposed when symlinked on host
#544
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Flatpak internally sets up a /var/run to /run symlink https://github.com/flatpak/flatpak/blob/fd1b7e444016d1b44bdab7cb5642b0ac83bd4b9e/common/flatpak-run.c#L2281. If it is symlinked on host too, when using
--filesystem=var/run/subpath
bwrap gets called twice to create the same symlink and the second one will fail.See also containers/bubblewrap@4109d59