BUG: Fix handling of non-empty ndarrays

1 files changed, 5 insertions, 3 deletions

diff --git a/numpy/lib/index_tricks.py b/numpy/lib/index_tricks.py
index 2bb11bf1e..752407f18 100644
--- a/numpy/lib/index_tricks.py
+++ b/numpy/lib/index_tricks.py
@@ -72,10 +72,12 @@ def ix_(*args):
     out = []
     nd = len(args)
     for k, new in enumerate(args):
-        # Explicitly type empty sequences to avoid float default
-        new = asarray(new, dtype=None if new else _nx.intp)
-        if (new.ndim != 1):
+        new = asarray(new)
+        if new.ndim != 1:
             raise ValueError("Cross index must be 1 dimensional")
+        if new.size == 0:
+            # Explicitly type empty arrays to avoid float default
+            new = new.astype(_nx.intp)
         if issubdtype(new.dtype, _nx.bool_):
             new, = new.nonzero()
         new.shape = (1,)*k + (new.size,) + (1,)*(nd-k-1)