[release/5.0] Set default value for value-type ctor params properly (#43831)#45457
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layomia merged 1 commit intodotnet:release/5.0from Dec 8, 2020
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* Set default value for value-type ctor params properly * Address review feedback
layomia
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steveharter
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steveharter
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Looks like a direct port minus adding extension method Type.IsNullableOfT
ericstj
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When is this fix going to be released? |
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Ports #43831 to 5.0
Fixes #43757 in 5.0
Description
Fixes bug where a
NullReferenceExceptionis thrown when (de)serializing a type whose constructor hasdefaultis set as optional argument default for a value-typed ctor parameter. For example, this type:Customer Impact
Avoids a
NullReferenceExceptionin a potentially common scenario.Regression
Not a regression since the deserialization-with-paramterized-ctor feature is new in 5.0.
Testing
Unit tests have been added to verify the expected behavior.
Risk
Little to none. This is a very small and scoped change to address this issue only.