[release/9.0] Fix Contains on ImmutableArray #35251
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This was referenced Sep 15, 2025
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Fixes #35102
Backport of #35247
Description
Because of query pipeline internal changes in EF Core 9 we started to improperly handle value type collections - like
ImmutableArray<T>- when pre-processing query's expression tree. Value types require boxing when handled via interfaces (IEnumerable<T>in this case). This boxing conversion/node was missing.Customer impact
Customers using
ImmutableArray<T>(or any collection that's a value type) experience an exception when running their application.How found
Customer reported on 9.
Regression
Yes, from 8.
Testing
Tests added.
Risk
Low.