46df2b8625
Apparently rust bindgen uses a hack which assumes all specializations of `UniquePtr` have the basic layout and use a pointer member with an empty deleter. This incorrect assumption unfortunately comes up for UniqueFileHandle, which replaces the pointer type using the deleter with a file handle helper type. As this fails to build with RUST_BINDGEN, this patch takes the same approach as bug 1802320, and just disables building these types when building headers for bindgen. This does not fix the general issue of bindgen making incorrect assumptions about the layout of UniquePtr with non-default deleters. Ideally, all non-default deleters should be made opaque. Differential Revision: https://phabricator.services.mozilla.com/D223628
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