set Print.values to NULL if there are no values
diff --git a/Python/ast.c b/Python/ast.c
index d259259..a415495 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -2144,9 +2144,9 @@
| '>>' test [ (',' test)+ [','] ] )
*/
expr_ty dest = NULL, expression;
- asdl_seq *seq;
+ asdl_seq *seq = NULL;
bool nl;
- int i, j, start = 1;
+ int i, j, values_count, start = 1;
REQ(n, print_stmt);
if (NCH(n) >= 2 && TYPE(CHILD(n, 1)) == RIGHTSHIFT) {
@@ -2155,14 +2155,17 @@
return NULL;
start = 4;
}
- seq = asdl_seq_new((NCH(n) + 1 - start) / 2, c->c_arena);
- if (!seq)
- return NULL;
- for (i = start, j = 0; i < NCH(n); i += 2, ++j) {
- expression = ast_for_expr(c, CHILD(n, i));
- if (!expression)
+ values_count = (NCH(n) + 1 - start) / 2;
+ if (values_count) {
+ seq = asdl_seq_new(values_count, c->c_arena);
+ if (!seq)
return NULL;
- asdl_seq_SET(seq, j, expression);
+ for (i = start, j = 0; i < NCH(n); i += 2, ++j) {
+ expression = ast_for_expr(c, CHILD(n, i));
+ if (!expression)
+ return NULL;
+ asdl_seq_SET(seq, j, expression);
+ }
}
nl = (TYPE(CHILD(n, NCH(n) - 1)) == COMMA) ? false : true;
return Print(dest, seq, nl, LINENO(n), n->n_col_offset, c->c_arena);