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[release/10.0.1xx] [dotnet-linker] Mark field references in trimmed INativeObject/NSObject constructors. Fixes #24663.#24689

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rolfbjarne merged 1 commit intorelease/10.0.1xxfrom
dev/rolf/backport-pr-24687-release/10.0.1xx-2026-02-12
Feb 12, 2026
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[release/10.0.1xx] [dotnet-linker] Mark field references in trimmed INativeObject/NSObject constructors. Fixes #24663.#24689
rolfbjarne merged 1 commit intorelease/10.0.1xxfrom
dev/rolf/backport-pr-24687-release/10.0.1xx-2026-02-12

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When the ManagedRegistrarLookupTablesStep re-marks a trimmed INativeObject
or NSObject constructor (for the ConstructINativeObject/ConstructNSObject
lookup tables), it was only marking MethodReference operands in the
constructor body but not FieldReference operands. This caused the linker's
SweepStep to remove fields referenced by the constructor (setting their
DeclaringType to null), and Cecil would then fail with 'Member is declared
in another module' when writing the assembly.

The fix extracts the marking logic into a new MarkConstructorIfTrimmed
method (eliminating code duplication) and adds marking of FieldReference
operands alongside the existing MethodReference marking.

Fixes #24663

Backport of #24687.

…ct constructors. Fixes #24663.

When the ManagedRegistrarLookupTablesStep re-marks a trimmed INativeObject
or NSObject constructor (for the ConstructINativeObject/ConstructNSObject
lookup tables), it was only marking MethodReference operands in the
constructor body but not FieldReference operands. This caused the linker's
SweepStep to remove fields referenced by the constructor (setting their
DeclaringType to null), and Cecil would then fail with 'Member is declared
in another module' when writing the assembly.

The fix extracts the marking logic into a new MarkConstructorIfTrimmed
method (eliminating code duplication) and adds marking of FieldReference
operands alongside the existing MethodReference marking.

Fixes #24663
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Pull request overview

This PR backports a fix from #24687 to the release/10.0.1xx branch for issue #24663, where the linker fails with "Member is declared in another module" when building apps with MtouchLink=SdkOnly. The issue occurred because the ManagedRegistrarLookupTablesStep was only marking MethodReference operands in trimmed constructor bodies but not FieldReference operands, causing the linker's SweepStep to remove fields referenced by the constructor.

Changes:

  • Extracts duplicated constructor marking logic into a new MarkConstructorIfTrimmed method
  • Adds marking of FieldReference operands alongside existing MethodReference marking
  • Eliminates code duplication between GenerateConstructNSObject and GenerateConstructINativeObject

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✅ [CI Build #2247f58] Build passed (Build packages) ✅

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✅ [PR Build #2247f58] Build passed (Detect API changes) ✅

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✅ API diff for current PR / commit

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Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

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✅ [CI Build #2247f58] Build passed (Build macOS tests) ✅

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💻 [CI Build #2247f58] Tests on macOS X64 - Mac Sonoma (14) passed 💻

All tests on macOS X64 - Mac Sonoma (14) passed.

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💻 [CI Build #2247f58] Tests on macOS arm64 - Mac Sequoia (15) passed 💻

All tests on macOS arm64 - Mac Sequoia (15) passed.

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💻 [CI Build #2247f58] Tests on macOS M1 - Mac Monterey (12) passed 💻

All tests on macOS M1 - Mac Monterey (12) passed.

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💻 [CI Build #2247f58] Tests on macOS M1 - Mac Ventura (13) passed 💻

All tests on macOS M1 - Mac Ventura (13) passed.

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💻 [CI Build #2247f58] Tests on macOS arm64 - Mac Tahoe (26) passed 💻

All tests on macOS arm64 - Mac Tahoe (26) passed.

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Hash: 2247f58848ba587a7afae92dff1c2d14969feef3 [PR build]

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@rolfbjarne rolfbjarne enabled auto-merge (squash) February 12, 2026 12:08
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🚀 [CI Build #2247f58] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 117 tests passed 🎉

Tests counts

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. [attempt 2] Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 4 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 9 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 9 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 9 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

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Hash: 2247f58848ba587a7afae92dff1c2d14969feef3 [PR build]

@rolfbjarne rolfbjarne merged commit e11d09f into release/10.0.1xx Feb 12, 2026
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4 participants