serif::solver::linear serif::solver::linear::ApplicationFailure serif::solver::linear::Control serif::solver::linear::FGMRES serif::solver::linear::Report serif::solver::linear::backend Status serif::solver::linear::Status converged maximum_iterations breakdown non_finite backend_failure Numerical termination of a checked Krylov solve. Invalid configuration remains a programming error. utils::errors::NonFiniteValue using serif::solver::linear::NonFiniteApplication = utils::errors::NonFiniteValue NonFiniteApplication serif::solver::linear::NonFiniteApplication Stop Krylov before a nonfinite application reaches MFEM internal arithmetic assertions.