The deleted test is a bad test: The behavior is different on different drivers, for example, the test fails on the Windows 10 and 11 testbot machines that have AMD video cards. Furthermore, MSDN does not say that the destination context "must not" have any display lists yet but rather that it "should not" have any.[1] The Khronos OpenGL Wiki similarly advises against calling wglShareLists after the source or destination context has at least one object, but if you do, it only says that "there is a chance that wglShareLists will fail", not that it will necessarily fail.[2] Since there's no clear "right" behavior here, we can adopt the more permissive behavior that some programs expect, as long as it doesn't corrupt the context.
[1] https://learn.microsoft.com/en-us/windows/win32/api/wingdi/nf-wingdi-wglshar... [2] https://www.khronos.org/opengl/wiki/Platform_specifics:_Windows#wglShareList...
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=11436
-- v3: winex11: Allow replacing either context in wglShareLists.