[flang-commits] [flang] [flang] Fix cycle detection in derived-type I/O checks (PR #213470)

[via flang-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 4883 tests passed
* 138 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Flang
<details>
<summary>Flang.Semantics/io-bad-allocatable.f90</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
"/usr/bin/python3" /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/test_errors.py /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/io-bad-allocatable.f90 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/flang -fc1 -fintrinsic-modules-path=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/24/finclude/flang/x86_64-unknown-linux-gnu
# executed command: /usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/test_errors.py /home/gha/actions-runner/_work/llvm-project/llvm-project/flang/test/Semantics/io-bad-allocatable.f90 /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/flang -fc1 -fintrinsic-modules-path=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/lib/clang/24/finclude/flang/x86_64-unknown-linux-gnu
# .---command stdout------------
# | --- 
# | +++ 
# | @@ -2 +2 @@
# | 
# | actual at 48: Derived type 'branch' in I/O cannot have an allocatable or pointer direct component 'a' unless using defined I/O
# | expect at 48: Derived type 'branch(k=2_4)' in I/O cannot have an allocatable or pointer direct component 'a' unless using defined I/O
# | 
# | FAIL
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/213470