Add tests for syntax errors.
diff --git a/Lib/test/test_genexps.py b/Lib/test/test_genexps.py
index ca5dd7d..04694f8 100644
--- a/Lib/test/test_genexps.py
+++ b/Lib/test/test_genexps.py
@@ -120,6 +120,19 @@
>>> max(tupleids) - min(tupleids)
0
+Verify that syntax error's are raised for genexps used as lvalues
+
+ >>> (y for y in (1,2)) = 10
+ Traceback (most recent call last):
+ ...
+ SyntaxError: assign to generator expression not possible
+
+ >>> (y for y in (1,2)) += 10
+ Traceback (most recent call last):
+ ...
+ SyntaxError: augmented assign to tuple literal or generator expression not possible
+
+
########### Tests borrowed from or inspired by test_generators.py ############