Raise early in jointplot when selected kind does not support hue (fixes

#2326)

seaborn/axisgrid.py

@@ -2054,6 +2054,13 @@ def jointplot(
     plot_kinds = ["scatter", "hist", "hex", "kde", "reg", "resid"]
     _check_argument("kind", plot_kinds, kind)
 
+    # Raise early if using `hue` with a kind that does not support it
+    if hue is not None and kind in ["hex", "reg", "resid"]:
+        msg = (
+            f"Use of `hue` with `kind='{kind}'` is not currently supported."
+        )
+        raise ValueError(msg)
+
     # Make a colormap based off the plot color
     # (Currently used only for kind="hex")
     if color is None:

seaborn/tests/test_axisgrid.py

@@ -1647,6 +1647,12 @@ def test_bad_kind(self):
         with pytest.raises(ValueError):
             ag.jointplot(x="x", y="y", data=self.data, kind="not_a_kind")
 
+    def test_unsupported_hue_kind(self):
+
+        for kind in ["reg", "resid", "hex"]:
+            with pytest.raises(ValueError):
+                ag.jointplot(x="x", y="y", hue="a", data=self.data, kind=kind)
+
     def test_leaky_dict(self):
         # Validate input dicts are unchanged by jointplot plotting function