[Bug 42009] Mentor Graphics DK Design Suite crashes on clipboard copy

https://bugs.winehq.org/show_bug.cgi?id=42009

--- Comment #6 from [e-mail] ---
I did some line by line debugging:
Start the app with winedbg, set breakpoint at OleSetClipboard and
EmptyClipboard, continue
In OleSetClipboard the IDataObject *data->lpVtbl is fine until the call to
EmptyClipboard was made.
After that data is altered and points to an invalid Vtbl.
Somewhere within EmptyClipboard, OleIsCurrentClipboard gets called, where data
is still fine.
I managed once to make it work by single stepping through OpenClipboard for
some lines, but could not reproduce that.
Can this be a race condition?