bugfix: Avoid `KeyError` in compilers.yaml version check
bugfix: Avoid `KeyError` in compilers.yaml version check

LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,iulian787/spack,LLNL/spack