[flang-commits] [flang] [flang] Fix seg fault `CodeGenAction::executeAction()` (PR #78269)

[Andrzej Warzyński via flang-commits]

https://github.com/banach-space commented:

Thanks! 

It would be good to add a diagnostic and a  test - perhaps trying compiling a "broken" MLIR file?

https://github.com/llvm/llvm-project/pull/78269