LLVM a0dab4950 has a segmentation fault in mlir::outlineSingleBlockRegion. NOTE: third parties dispute this because the LLVM security policy excludes "Language front-ends ... for which a malicious input file can cause undesirable behavior."
https://llvm.org/docs/Security.html#what-is-considered-a-security-issue
https://github.com/llvm/llvm-project/issues/60216
https://gist.github.com/Colloportus0/fc16d10d74aedf89d5d1d020ebb89c0c