language/environment: fix mutate_dataset with parent. Closes #498

m-labs · Jul 3, 2016 · 1946e3c · 1946e3c
1 parent bf3c3cd
commit 1946e3c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/artiq/language/environment.py b/artiq/language/environment.py
@@ -299,6 +299,7 @@ def mutate_dataset(self, key, index, value):
         as ``slice(*sub_tuple)`` (multi-dimensional slicing)."""
         if self.__parent is not None:
             self.__parent.mutate_dataset(key, index, value)
+            return
         if self.__dataset_mgr is None:
             raise ValueError("Dataset manager not present")
         self.__dataset_mgr.mutate(key, index, value)