Non-public properties in generated assembly break code completion #1111

Activity

1. dsyme

   added

   Bug

   Area-LangService-API

   Impact-Low(Internal MS Team use only) Describes an issue with limited impact on existing code.(Internal MS Team use only) Describes an issue with limited impact on existing code.

   on Jul 18, 2016
2. cartermp

   added this to the Unknown milestone on Aug 25, 2018
3. cartermp

   modified the milestones: Unknown / not bug, Backlog on May 23, 2019
4. dsyme

   modified the milestones: Backlog, Backlog - Lower Priority on Aug 26, 2020
5. cartermp

   modified the milestones: Backlog - Lower Priority, Backlog on Oct 28, 2020
6. dsyme

   added

   Area-LangService-AutoCompleteautocomplete/intellisenseautocomplete/intellisense

   and removed

   Area-LangService-API

   on Apr 5, 2022
7. vzarytovskii

   added this to F# Compiler and Toolingon Jun 17, 2022
8. vzarytovskii

   moved this to Not Planned in F# Compiler and Toolingon Jun 17, 2022
9. KevinRansom

   closed this as completedon Jan 4, 2024
10. github-project-automation

    moved this from New to Done in F# Compiler and Toolingon Jan 4, 2024
11. vzarytovskii

    reopened this on Jan 5, 2024
12. github-project-automation

    moved this from Done to In Progress in F# Compiler and Toolingon Jan 5, 2024
13. github-actions commented on Sep 26, 2026

    

    github-actionsBot

    on Sep 26, 2026 – with GitHub Actions

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    🤖 This is an automated response from Repo Assist.

    This still reproduces on current main at 4831b381ee941f8bb03a19332c671ac86b9e82c3 (committed 2026-09-25T14:47:51+02:00, 13 hours old when tested).

    I built the compiler from that revision and ran an FCS GetDeclarationListInfo test using a generative type provider whose generated int PrivateSetter property has a public getter and private setter. Completion was requested after:

    type T = GeneratedWithConstructor.Provided.GenerativeProvider<1>
    let value = T()
    value.

    The FCS trace reports:

    FCS: recovering from error in GetDeclarations: Property PrivateSetter on provided type T has CanWrite=true but there was no value from GetSetMethod()
    

    The completion list contained only <Note> and omitted PrivateSetter, matching the original report. The relevant current implementation still calls parameterless PropertyInfo.GetSetMethod(), which excludes a non-public setter even though CanWrite is true.

    Fresh compiler proof:

    Microsoft (R) F# Interactive version 15.2.200.0 for F# 11.2
    Language Version: 11.2
    FSharp.Core: 11.0.0.0
    .NET: .NET 11.0.0-rc.1.26420.103
    OS: Linux 6.17.0-1022-azure (X64)
    

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