[Bug 39670] Eclipse (Europa) does not start

https://bugs.winehq.org/show_bug.cgi?id=39670

--- Comment #2 from Nikolay Sivov  ---
Hi, Wylda.

I can confirm that, and regression test looks valid. I spent some time
yesterday trying to debug this by disabling sections of SetClientSite(), and
looks like crash happens in release_client_site(), if I disable this block:

---
    if(This->sink) {
        IAdviseSink_Release(This->sink);
        This->sink = NULL;
    }
---

it works for me. And this hunk is a part of this bad commit you found, so it
makes sense so far.