go source for verification 2026-05-22

test/fixedbugs/issue62203.go

@@ -0,0 +1,32 @@
+// run
+
+// Copyright 2023 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 (
+	"fmt"
+	"maps"
+)
+
+func main() {
+	m := map[string]struct{}{}
+
+	// Fill m up to the max for 4 buckets = 48 entries.
+	for i := 0; i < 48; i++ {
+		m[fmt.Sprintf("%d", i)] = struct{}{}
+	}
+
+	// Add a 49th entry, to start a grow to 8 buckets.
+	m["foo"] = struct{}{}
+
+	// Remove that 49th entry. m is still growing to 8 buckets,
+	// but a clone of m will only have 4 buckets because it
+	// only needs to fit 48 entries.
+	delete(m, "foo")
+
+	// Clone an 8-bucket map to a 4-bucket map.
+	_ = maps.Clone(m)
+}