1 files changed, 39 insertions, 0 deletions
diff --git a/src/runtime/secret/alloc_test.go b/src/runtime/secret/alloc_test.go
new file mode 100644
index 0000000000..8f82dad4b5
--- /dev/null
+++ b/src/runtime/secret/alloc_test.go
@@ -0,0 +1,39 @@
+// 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.
+
+//go:build goexperiment.runtimesecret && (arm64 || amd64) && linux
+
+package secret_test
+
+import (
+	"runtime"
+	"runtime/secret"
+	"testing"
+)
+
+func TestInterleavedAllocFrees(t *testing.T) {
+	// Interleave heap objects that are kept alive beyond secret.Do
+	// with heap objects that do not live past secret.Do.
+	// The intent is for the clearing of one object (with the wrong size)
+	// to clobber the type header of the next slot. If the GC sees a nil type header
+	// when it expects to find one, it can throw.
+	type T struct {
+		p *int
+		x [1024]byte
+	}
+	for range 10 {
+		var s []*T
+		secret.Do(func() {
+			for i := range 100 {
+				t := &T{}
+				if i%2 == 0 {
+					s = append(s, t)
+				}
+			}
+		})
+		runtime.GC()
+		runtime.GC()
+		runtime.KeepAlive(s)
+	}
+}