[3.14] gh-138479: Ensure that __typing_subst__
returns a tuple (GH-138482)
#138784
+31
−0
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Raise an exception if typing_subst returns a non-tuple object.
(cherry picked from commit 1da989b)
Co-authored-by: Peter Bierma zintensitydev@gmail.com
Co-authored-by: Serhiy Storchaka storchaka@gmail.com