diff --git a/src/vector/backends/_numba_object.py b/src/vector/backends/_numba_object.py
index 5e744c5e..529373f5 100644
--- a/src/vector/backends/_numba_object.py
+++ b/src/vector/backends/_numba_object.py
@@ -1431,6 +1431,9 @@ def overloader(v1, v2):
             coord23 = getcoord1[numba_ltype(v2)]
             coord24 = getcoord1[numba_ttype(v2)]
 
+        else:
+            raise AssertionError
+
         if groupname == "planar":
             signature = (numba_aztype(v1), numba_aztype(v2))
 
@@ -1452,6 +1455,9 @@ def overloader(v1, v2):
                 numba_ttype(v2),
             )
 
+        else:
+            raise AssertionError
+
         function, *returns = _from_signature(
             groupname + "." + methodname,
             numba_modules[groupname][methodname],
@@ -1639,6 +1645,9 @@ def overloader_impl(v1, v2, tolerance=1e-5):  # pragma: no cover
             coord22 = getcoord2[numba_aztype(v2)]
             coord23 = getcoord1[numba_ltype(v2)]
 
+        else:
+            raise AssertionError
+
         function, *_ = _from_signature(
             groupname + "." + methodname,
             numba_modules[groupname][methodname],
@@ -1788,6 +1797,9 @@ def overloader_impl(v1, v2, rtol=1e-05, atol=1e-08, equal_nan=False):
                     coord24(v2),
                 )
 
+        else:
+            raise AssertionError
+
         return overloader_impl
 
 
@@ -1898,6 +1910,9 @@ def overloader_impl(v, obj):
                 )
                 return instance_class(azcoords(out1, out2), v.longitudinal, v.temporal)
 
+        else:
+            raise AssertionError
+
         return overloader_impl