1 files changed, 30 insertions, 0 deletions
diff --git a/src/internal/trace/testdata/generators/go123-sync.go b/src/internal/trace/testdata/generators/go123-sync.go
new file mode 100644
index 0000000000..257581c7ea
--- /dev/null
+++ b/src/internal/trace/testdata/generators/go123-sync.go
@@ -0,0 +1,30 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"internal/trace"
+	"internal/trace/internal/testgen"
+	"internal/trace/tracev2"
+	"internal/trace/version"
+	"time"
+)
+
+func main() {
+	testgen.Main(version.Go123, gen)
+}
+
+func gen(t *testgen.Trace) {
+	g1 := t.Generation(1)
+	g1.Sync(1000000000, 10, 0, time.Time{})
+	b10 := g1.Batch(1, 15)
+	b10.Event("ProcStatus", trace.ProcID(0), tracev2.ProcRunning)
+	g2 := t.Generation(2)
+	g2.Sync(500000000, 20, 0, time.Time{})
+	g3 := t.Generation(3)
+	b30 := g3.Batch(1, 30)
+	b30.Event("ProcStatus", trace.ProcID(0), tracev2.ProcRunning)
+	g3.Sync(500000000, 40, 0, time.Time{})
+}