[flang-commits] [flang] [Flang] Fix crash when a derived type with private attribute is specified in extends (PR #151051)

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llvmbot wrote:

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Failed to cherry-pick: 9bb31e8

https://github.com/llvm/llvm-project/actions/runs/16727640016

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/151051