--- /dev/null
+'rule inet dscpclassify dscp_match meta l4proto { udp } th dport { 3478 } th sport { 3478-3497, 16384-16387 } goto ct_set_ef'
+works with 'nft add', but not 'nft insert', the latter yields: "BUG: unhandled op 4".
+
+Fixes: 81e36530fcac ("src: replace interval segment tree overlap and automerge")
+Signed-off-by: Florian Westphal <fw@strlen.de>
+---
+ src/evaluate.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/evaluate.c b/src/evaluate.c
+index d9c9ca28a53a..edebd7bcd8ab 100644
+--- a/src/evaluate.c
++++ b/src/evaluate.c
+@@ -1520,6 +1520,7 @@ static int interval_set_eval(struct eval_ctx *ctx, struct set *set,
+ switch (ctx->cmd->op) {
+ case CMD_CREATE:
+ case CMD_ADD:
++ case CMD_INSERT:
+ if (set->automerge) {
+ ret = set_automerge(ctx->msgs, ctx->cmd, set, init,
+ ctx->nft->debug_mask);
+--
+2.35.1