1 files changed, 17 insertions, 0 deletions
diff --git a/src/cmd/cgo/ast_go1.go b/src/cmd/cgo/ast_go1.go
new file mode 100644
index 0000000..f52bf00
--- /dev/null
+++ b/src/cmd/cgo/ast_go1.go
@@ -0,0 +1,17 @@
+// Copyright 2021 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 compiler_bootstrap
+// +build compiler_bootstrap
+
+package main
+
+import (
+	"go/token"
+)
+
+func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
+	error_(token.NoPos, "unexpected type %T in walk", x)
+	panic("unexpected type")
+}