Merge branch 'golang:master' into master

Author: kevin-valerio

doc/next/6-stdlib/99-minor/net/http/httptest/31054.md

@@ -0,0 +1,2 @@
+The HTTP client returned by [Server.Client] will now redirect requests for
+`example.com` and any subdomains to the server being tested.

src/cmd/cgo/internal/testplugin/plugin_test.go

@@ -422,3 +422,11 @@ func TestIssue67976(t *testing.T) {
 	globalSkip(t)
 	goCmd(t, "build", "-buildmode=plugin", "-o", "issue67976.so", "./issue67976/plugin.go")
 }
+
+func TestIssue75102(t *testing.T) {
+	globalSkip(t)
+	// add gcflags different from the executable file to trigger plugin open failed.
+	goCmd(t, "build", "-gcflags=all=-N -l", "-buildmode=plugin", "-o", "issue75102.so", "./issue75102/plugin.go")
+	goCmd(t, "build", "-o", "issue75102.exe", "./issue75102/main.go")
+	run(t, "./issue75102.exe")
+}

src/cmd/cgo/internal/testplugin/testdata/issue75102/main.go

@@ -0,0 +1,21 @@
+// 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 (
+	"fmt"
+	"plugin"
+)
+
+func init() {
+	_, err := plugin.Open("issue75102.so")
+	if err == nil {
+		panic("unexpected success to open a different version plugin")
+	}
+}
+
+func main() {
+	fmt.Println("done")
+}

src/cmd/cgo/internal/testplugin/testdata/issue75102/plugin.go

@@ -0,0 +1,11 @@
+// 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
+
+func init() {
+	panic("unexpected call to init")
+}
+
+func main() {}

src/cmd/compile/internal/ir/mknode.go

@@ -258,6 +258,7 @@ func processType(t *ast.TypeSpec) {
 	var doChildrenWithHiddenBody strings.Builder
 	var editChildrenBody strings.Builder
 	var editChildrenWithHiddenBody strings.Builder
+	var hasHidden bool
 	for _, f := range fields {
 		names := f.Names
 		ft := f.Type
@@ -309,6 +310,7 @@ func processType(t *ast.TypeSpec) {
 					"if n.%s != nil {\nn.%s = edit(n.%s).(%s%s)\n}\n", name, name, name, ptr, ft)
 			}
 			if hidden {
+				hasHidden = true
 				continue
 			}
 			if isSlice {
@@ -327,19 +329,27 @@ func processType(t *ast.TypeSpec) {
 	}
 	fmt.Fprintf(&buf, "func (n *%s) copy() Node {\nc := *n\n", name)
 	buf.WriteString(copyBody.String())
-	fmt.Fprintf(&buf, "return &c\n}\n")
+	buf.WriteString("return &c\n}\n")
 	fmt.Fprintf(&buf, "func (n *%s) doChildren(do func(Node) bool) bool {\n", name)
 	buf.WriteString(doChildrenBody.String())
-	fmt.Fprintf(&buf, "return false\n}\n")
+	buf.WriteString("return false\n}\n")
 	fmt.Fprintf(&buf, "func (n *%s) doChildrenWithHidden(do func(Node) bool) bool {\n", name)
-	buf.WriteString(doChildrenWithHiddenBody.String())
-	fmt.Fprintf(&buf, "return false\n}\n")
+	if hasHidden {
+		buf.WriteString(doChildrenWithHiddenBody.String())
+		buf.WriteString("return false\n}\n")
+	} else {
+		buf.WriteString("return n.doChildren(do)\n}\n")
+	}
 	fmt.Fprintf(&buf, "func (n *%s) editChildren(edit func(Node) Node) {\n", name)
 	buf.WriteString(editChildrenBody.String())
-	fmt.Fprintf(&buf, "}\n")
+	buf.WriteString("}\n")
 	fmt.Fprintf(&buf, "func (n *%s) editChildrenWithHidden(edit func(Node) Node) {\n", name)
-	buf.WriteString(editChildrenWithHiddenBody.String())
-	fmt.Fprintf(&buf, "}\n")
+	if hasHidden {
+		buf.WriteString(editChildrenWithHiddenBody.String())
+	} else {
+		buf.WriteString("n.editChildren(edit)\n")
+	}
+	buf.WriteString("}\n")
 }
 
 func generateHelpers() {