Add a test to verify an early call to iter() on the outermost for
expression.
diff --git a/Lib/test/test_genexps.py b/Lib/test/test_genexps.py
index b09fc95..31e133f 100644
--- a/Lib/test/test_genexps.py
+++ b/Lib/test/test_genexps.py
@@ -91,6 +91,15 @@
>>> list(g)
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
+Verify that the outermost for-expression makes an immediate check
+for iterability
+
+ >>> (i for i in 6)
+ Traceback (most recent call last):
+ File "<pyshell#4>", line 1, in -toplevel-
+ (i for i in 6)
+ TypeError: iteration over non-sequence
+
Verify late binding for the outermost if-expression
>>> include = (2,4,6,8)