[release/8.0-staging] Add JSON null support for the built-in (ReadOnly)Memory converters. #95325
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Tagging subscribers to this area: @dotnet/area-system-text-json, @gregsdennis Issue DetailsBackport of #95275 to release/8.0-staging /cc @eiriktsarpalis Customer ImpactTestingRiskIMPORTANT: If this backport is for a servicing release, please verify that:
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Backport of #95275 to release/8.0-staging
/cc @eiriktsarpalis
Customer Impact
.NET 8 saw the inclusion of new built-in converters for
Memory<T>andReadOnlyMemory<T>types. These converters will throw an exception on deserialization if given anullJSON value. While this behavior is consistent with other non-nullable struct types, we feel that it should be tweaked forMemorytypes since they allow implicit conversion fromnullin .NET code. The change is being backported to .NET 8 since SK adoption of the new built-in converters is blocked because of this issue.Testing
Added unit tests covering the newly added behavior.
Risk
Low. Adds null handling functionality to the specific built-in converers.