fixed #127

scikit-hep · Jul 10, 2019 · c5180b0 · c5180b0
1 parent d7f351f
commit c5180b0
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/awkward/array/jagged.py b/awkward/array/jagged.py
@@ -1626,7 +1626,11 @@ def get_mask(array_index):
         # find most general type with a tentative sum which implements the right type-promotion,
         # except for booleans which would get promoted to integers when summing
         def get_dtype(arrays):
-            dtype = np.dtype(sum([x[0] for x in arrays if len(x) != 0]), False)
+            ick = [x[0] for x in arrays if len(x) != 0]
+            if len(ick) == 0:
+                dtype = np.dtype(arrays[0].dtype)
+            else:
+                dtype = np.dtype(sum(ick), False)
             allbools = not np.any([a.dtype != np.dtype(bool) for a in arrays])
             dtype = np.dtype(bool) if allbools else dtype
             return dtype

diff --git a/awkward/version.py b/awkward/version.py
@@ -4,7 +4,7 @@
 
 import re
 
-__version__ = "0.12.0"
+__version__ = "0.12.1"
 version = __version__
 version_info = tuple(re.split(r"[-\.]", __version__))