Update to go1.25.0

test/escape6.go

@@ -0,0 +1,59 @@
+// errorcheck -0 -m -l
+
+// 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.
+
+// Tests for escaping variable-sized allocations.
+// In particular, we need to make sure things assigned into
+// variable-sized allocations escape even when the variable-sized
+// allocations themselves don't escape.
+
+package foo
+
+type T string
+
+func f1(n int, v T) { // ERROR "leaking param: v"
+	s := make([]T, n) // ERROR "make\(\[\]T, n\) does not escape"
+	s[0] = v
+	g(s)
+}
+
+func f2(n int, v T) { // ERROR "leaking param: v"
+	s := make([]T, n) // ERROR "make\(\[\]T, n\) does not escape"
+	p := &s[0]
+	*p = v
+	g(s)
+}
+
+func f3(n int, v T) { // ERROR "leaking param: v"
+	s := make([]T, n) // ERROR "make\(\[\]T, n\) does not escape"
+	t := (*[4]T)(s)
+	t[0] = v
+	g(s)
+}
+
+// TODO: imprecise: this does not need to leak v.
+func f4(v T) { // ERROR "leaking param: v"
+	s := make([]T, 4) // ERROR "make\(\[\]T, 4\) does not escape"
+	s[0] = v
+	g(s)
+}
+
+// TODO: imprecise: this does not need to leak v.
+func f5(v T) { // ERROR "leaking param: v"
+	var b [4]T
+	s := b[:]
+	s[0] = v
+	g(s)
+}
+
+func f6(v T) { // ERROR "v does not escape"
+	var b [4]T
+	s := b[:]
+	b[0] = v
+	g(s)
+}
+
+func g(s []T) { // ERROR "s does not escape"
+}