[xaml] fix potential NRE in {Binding}
#24756
Open
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Fixes: #24740
Context: cb0a332#diff-4f7a4722cd9e9622fcdb5c9c2a596997f8c6b7b9af8b51c5469e8ea59a3d9a48
Using this in a project:
Then, in a XAML file:
Would crash with:
Inspecting the IL, I see:
So, it is indeed passed a
null
IServiceProvider
.Introduce a unit test and check for
null
as a fix.