More detailed testing for value-error-too-few-values.

jedi/evaluate/iterable.py

@@ -401,7 +401,7 @@ def unpack_tuple_to_dict(evaluator, types, exprlist):
             else:
                 dct.update(unpack_tuple_to_dict(evaluator, iter_types, part))
         has_parts = next(parts, None)
-        if n > 0 and has_parts is not None:
+        if types and has_parts is not None:
             analysis.add(evaluator, 'value-error-too-few-values', has_parts,
                          message="ValueError: need more than %s values to unpack" % n)
         return dct

test/static_analysis/iterable.py

@@ -15,4 +15,7 @@ for x, y in dct:
 
 # Shouldn't cause issues, because if there are no types (or we don't know what
 # the types are, we should just ignore it.
+#! 0 value-error-too-few-values
 a, b = []
+#! 7 name-error
+a, b = NOT_DEFINED