check for inputs first

pymc-devs · Jan 24, 2025 · b36e573 · b36e573
1 parent 7b39d7a
commit b36e573
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/pymc/data.py b/pymc/data.py
@@ -153,7 +153,12 @@ def first_inputs(r):
     if not r.owner:
         return
 
-    first_input = r.owner.inputs[0]
+    inputs = r.owner.inputs
+
+    if not inputs:
+        return
+
+    first_input = inputs[0]
     yield first_input
     yield from first_inputs(first_input)