1 files changed, 19 insertions, 0 deletions
diff --git a/internal/gcimporter/ureader_no.go b/internal/gcimporter/ureader_no.go
new file mode 100644
index 000000000..8eb20729c
--- /dev/null
+++ b/internal/gcimporter/ureader_no.go
@@ -0,0 +1,19 @@
+// Copyright 2022 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 !go1.18
+// +build !go1.18
+
+package gcimporter
+
+import (
+	"fmt"
+	"go/token"
+	"go/types"
+)
+
+func UImportData(fset *token.FileSet, imports map[string]*types.Package, data []byte, path string) (_ int, pkg *types.Package, err error) {
+	err = fmt.Errorf("go/tools compiled with a Go version earlier than 1.18 cannot read unified IR export data")
+	return
+}