Merge pull request #7045 from oliver-sanders/6855

runahead limit: fix possible mode of failure

Author: wxtim

cylc/flow/task_pool.py

@@ -442,12 +442,11 @@ def compute_runahead(self, force=False) -> bool:
             self._prev_runahead_sequence_points = sequence_points
             self._prev_runahead_base_point = base_point
 
-        if count_cycles:
-            if not sequence_points:
-                limit_point = base_point
-            else:
-                # (len(list) may be less than ilimit due to sequence end)
-                limit_point = sorted(sequence_points)[:ilimit + 1][-1]
+        if not sequence_points:
+            limit_point = base_point
+        elif count_cycles:
+            # (len(list) may be less than ilimit due to sequence end)
+            limit_point = sorted(sequence_points)[:ilimit + 1][-1]
         else:
             limit_point = max(sequence_points)