From 750789fab7f9cccc0756c5ec0d0952c917a4546f Mon Sep 17 00:00:00 2001
From: =?utf8?q?Felix=20Geisend=C3=B6rfer?=
 <felix.geisendoerfer@datadoghq.com>
Date: Sun, 22 Jun 2025 15:29:34 +0200
Subject: [PATCH] internal/trace/internal/testgen: fix missing stacks nframes
 arg

Change-Id: I6a6a6964c9c1322bfe289394d5d3937d1f7097bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/694616
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
---
 src/internal/trace/internal/testgen/trace.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/internal/trace/internal/testgen/trace.go b/src/internal/trace/internal/testgen/trace.go
index 415acaccae..38d2febb43 100644
--- a/src/internal/trace/internal/testgen/trace.go
+++ b/src/internal/trace/internal/testgen/trace.go
@@ -295,7 +295,7 @@ func (g *Generation) writeEventsTo(tw *raw.TextWriter) {
 	b.RawEvent(tracev2.EvStacks, nil)
 	for stk, id := range g.stacks {
 		stk := stk.stk[:stk.len]
-		args := []uint64{id}
+		args := []uint64{id, uint64(len(stk))}
 		for _, f := range stk {
 			args = append(args, f.PC, g.String(f.Func), g.String(f.File), f.Line)
 		}
-- 
2.51.0