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-rw-r--r--Python/ast.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/Python/ast.c b/Python/ast.c
index bb1774b..3c339f0 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -1317,16 +1317,20 @@ ast_for_slice(struct compiling *c, const node *n)
ch = CHILD(n, NCH(n) - 1);
if (TYPE(ch) == sliceop) {
- if (NCH(ch) == 1)
- /* XXX: If only 1 child, then should just be a colon. Should we
- just skip assigning and just get to the return? */
- ch = CHILD(ch, 0);
- else
- ch = CHILD(ch, 1);
- if (TYPE(ch) == test) {
- step = ast_for_expr(c, ch);
+ if (NCH(ch) == 1) {
+ /* No expression, so step is None */
+ ch = CHILD(ch, 0);
+ step = Name(new_identifier("None", c->c_arena), Load,
+ LINENO(ch), ch->n_col_offset, c->c_arena);
if (!step)
return NULL;
+ } else {
+ ch = CHILD(ch, 1);
+ if (TYPE(ch) == test) {
+ step = ast_for_expr(c, ch);
+ if (!step)
+ return NULL;
+ }
}
}