improve error handling

Author: yf225

helion/autotuner/base_search.py

@@ -393,11 +393,12 @@ def population_statistics(population: list[PopulationMember]) -> str:
         working = [x for x in population if not math.isinf(x.perf)]
         return (
             f"failed={len(population) - len(working)} "
+        ) + (
             f"min={working[0].perf:.4f} "
             f"mid={working[len(working) // 2].perf:.4f} "
             f"max={working[-1].perf:.4f} "
             f"best={population[0].config!s}"
-        )
+        ) if len(working) > 0 else "all failed!"
     return (
         f"min={population[0].perf:.4f} "
         f"mid={population[len(population) // 2].perf:.4f} "