The list comp patch checked for the second child node of the 'listmaker'

node, without checking if the node actually had more than one child. It can
have only one node, though: '[' test ']'. This fixes it.

diff --git a/Python/compile.c b/Python/compile.c
index adefb4fbbabec07f8c943b9d54758d96d0177432..476f1f20bfa04ccfbb696b6559072487c3898d25 100644 (file)
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1045,7 +1045,7 @@ static void
 com_listmaker(struct compiling *c, node *n)
 {
        /* listmaker: test ( list_iter | (',' test)* [','] ) */
-       if (TYPE(CHILD(n, 1)) == list_iter)
+       if (NCH(n) > 1 && TYPE(CHILD(n, 1)) == list_iter)
                com_list_comprehension(c, n);
        else {
                int len = 0;