Do not normalize an empty Defects() object.

lsst · Apr 6, 2021 · f05a3d0 · f05a3d0
1 parent 88e411d
commit f05a3d0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/python/lsst/ip/isr/defects.py b/python/lsst/ip/isr/defects.py
@@ -185,6 +185,10 @@ def _normalize(self):
         if self._bulk_update:
             return
 
+        # If we have no defects, there is nothing to normalize.
+        if len(self) == 0:
+            return
+
         # work out the minimum and maximum bounds from all defect regions.
         minX, minY, maxX, maxY = float('inf'), float('inf'), float('-inf'), float('-inf')
         for defect in self: