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Fix covariant returns scenarios in task-returning methods - #132425

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VSadov with Copilot wants to merge 21 commits into

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copilot/handle-covariant-returns

Commits on Sep 22, 2026

Add covariant-return tests for custom Task-derived return types

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e5ebd2a
Add tests for covariant overrides returning custom Task-derived types

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bc530ba
Classify covariant overrides of task-returning methods as task-returning

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a7939c3
Emit a forwarding thunk for covariant Task-derived async overrides

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56d217b
Enable previously failing covariant-of-covariant override test

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beec546
Disable covariant-return async test on NativeAOT and Mono

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224055a
Support generic scenarios in covariant Task-derived overrides

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f5cebe2
Add array-typed generic element test for covariant Task overrides

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7921893
Avoid creating MethodDescs while building a method table

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9cc4904
Add cDAC covariant thunk flag coverage

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391b5eb
Split Task-derived covariant async tests

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2242754
Resolve hierarchy substitution for MethodDef covariant MethodImpl decls

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edca7a1
Fix generics info accessor name in covariant override handling

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f242c2a
Clarify comment on why covariant forwarding thunk is used over async version

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41c8679
Mark the await in covariant forwarding thunk as tail-await

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5324c19

Commits on Sep 23, 2026

Add multi-hop generic covariant task test

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VSadov
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f69656c

Commits on Sep 24, 2026

Make abstract covariant async forwarding variants concrete

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938f966
Merge remote-tracking branch 'origin/main' into copilot/handle-covariant-returns

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VSadov
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6216144
Refactor data handling in methodtablebuilder.cpp

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Copilot
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7f8853b

Commits on Sep 25, 2026

Merge branch 'main' into copilot/handle-covariant-returns
VSadov
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8da7aec
Handle custom modifiers in covariant async variant signatures

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VSadov
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323720f