jinja : fix negative step slice with start/stop values (#24580)

2026-06-13 18:28:40 +02:00
parent e8067a8b36
commit f05cf4676a
3 changed files with 23 additions and 5 deletions
@@ -90,14 +90,14 @@ static T slice(const T & array, int64_t start, int64_t stop, int64_t step = 1) {
            stop_val = std::min(stop_val, len);
        }
    } else {
-        start_val = len - 1;
+        start_val = start;
        if (start_val < 0) {
-            start_val = std::max(len + start_val, (int64_t)-1);
+            start_val = std::max(len + start_val, (int64_t)0);
        } else {
            start_val = std::min(start_val, len - 1);
        }

-        stop_val = -1;
+        stop_val = stop;
        if (stop_val < -1) {
            stop_val = std::max(len + stop_val, (int64_t)-1);
        } else {