Re: [PATCH 0/1] MR2308: mfreadwrite/reader: Release device manager in source_reader_release.

[Nikolay Sivov (＠nsivov)]

Please add a refcount test for this, for example in existing test_reader_d3d9(), to demonstrate that manager refcount balanced correctly.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/2308#note_25889