Add workaround for SafeRegistryHandle marshalling issue in System.Speech.

[shaunren]

Currently, in Mono, the COM interface pointer of the SafeRegistryHandle is passed to the native method, rather than the underlying handle.

[madewokherd]

That's odd, Mono should handle this.

[madewokherd]

Can you check whether this change in Mono fixes it?

diff --git a/mono/metadata/cominterop.c b/mono/metadata/cominterop.c
index 227045d7367..bd634e0bf4c 100644
--- a/mono/metadata/cominterop.c
+++ b/mono/metadata/cominterop.c
@@ -1028,6 +1028,11 @@ cominterop_class_marshalled_as_interface (MonoClass* klass)
        if (MONO_CLASS_IS_INTERFACE_INTERNAL (klass))
                return TRUE;
 
+       // subclasses of SafeHandle should use default marshaling
+       if (mono_class_try_get_safehandle_class () != NULL &&
+               mono_class_is_subclass_of_internal (klass,  mono_class_try_get_safehandle_class (), FALSE))
+               return FALSE;
+
        // Classes are marshalled as interfaces if their layout is not specified explicitly
        if (mono_class_is_auto_layout (klass))
                return TRUE;

[shaunren]

This patch works as well.

[madewokherd]

Should be fixed in Wine Mono 8.1.0, which will be in Wine 8.19. I also pushed that update to Proton Experimental bleeding-edge.