Use UnsafeAccessor/reflection for inaccessible members in source-generated JsonTypeInfo#124650

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Copilot wants to merge 31 commits intomainfrom

copilot/fix-default-values-json-serialization-again

Commits on Feb 20, 2026

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Fix init-only property default values lost with source-generated JsonTypeInfo

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eiriktsarpalis
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Add tests for init-only property default value preservation

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eiriktsarpalis
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Address review comments: per-property unsafe accessor checks, lazy reflection, JsonInclude support, rename to requiredMembers

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eiriktsarpalis
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Move CanUseUnsafeAccessors to PropertyGenerationSpec, remove IsGenericType from TypeRef

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eiriktsarpalis
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Replace Lazy<PropertyInfo> with nullable field and helper method for reflection fallback

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eiriktsarpalis
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Cache delegates instead of PropertyInfo for reflection fallback

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eiriktsarpalis
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Always expose setter for init-only properties, including required ones

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eiriktsarpalis
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Add extensive tests for [JsonInclude] against private/inaccessible members

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eiriktsarpalis
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Fix failing build: update diagnostic test for inaccessible JsonInclude

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eiriktsarpalis
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Commits on Feb 24, 2026

Commits on Feb 25, 2026

Commits on Feb 26, 2026

Fix inaccessible ctor + required member initializers

eiriktsarpalis
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Copilot
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Commits on Feb 27, 2026

Fix field reflection fallback: cache FieldInfo instead of method group

eiriktsarpalis
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Copilot
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Commits on Mar 20, 2026