LLVM project broken in GCC 7

There is this bug : Error when compiling with GCC 7 · Issue #63843 · llvm/llvm-project · GitHub
talking about commit which broke llvm project compiling in GCC 7.
Can anyone help with this?

This has happened before and will happen in the future. Can we have at least one buildbot running with the compilers/environment specified in the minimum requirements?