Update to go1.25.0

test/fixedbugs/issue71226.go

@@ -0,0 +1,29 @@
+// build
+
+//go:build cgo
+
+// 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
+
+/*
+#cgo CFLAGS: -Werror -Wimplicit-function-declaration
+
+#include <stdio.h>
+
+static void CFn(_GoString_ gostr) {
+	printf("%.*s\n", (int)(_GoStringLen(gostr)), _GoStringPtr(gostr));
+}
+*/
+import "C"
+
+func main() {
+	C.CFn("hello, world")
+}
+
+// The bug only occurs if there is an exported function.
+//export Fn
+func Fn() {
+}