[llvm] [flang] [flang-rt] Subscript overrun could occur in namelists during a READ command. (PR #176959)

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kwyatt-ext wrote:

There was not an opened issue.  This was my first fix and I never opened one.  It was identified when we ran an internal cray test against flang.  If I need to (or you'd just prefer), I will open one.  The PR will end up being a description of a core/hanging and the test associated with this PR: https://github.com/llvm/llvm-test-suite/pull/361.

Please let me know how I should proceed and I'll be happy to.  Thank you for looking.

https://github.com/llvm/llvm-project/pull/176959