1 files changed, 42 insertions, 0 deletions
diff --git a/src/go/ast/issues_test.go b/src/go/ast/issues_test.go
new file mode 100644
index 0000000..788c557
--- /dev/null
+++ b/src/go/ast/issues_test.go
@@ -0,0 +1,42 @@
+// Copyright 2019 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 ast_test
+
+import (
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"testing"
+)
+
+func TestIssue33649(t *testing.T) {
+	for _, src := range []string{
+		`package p; func _()`,
+		`package p; func _() {`,
+		`package p; func _() { _ = 0`,
+		`package p; func _() { _ = 0 }`,
+	} {
+		fset := token.NewFileSet()
+		f, _ := parser.ParseFile(fset, "", src, parser.AllErrors)
+		if f == nil {
+			panic("invalid test setup: parser didn't return an AST")
+		}
+
+		// find corresponding token.File
+		var tf *token.File
+		fset.Iterate(func(f *token.File) bool {
+			tf = f
+			return true
+		})
+		tfEnd := tf.Base() + tf.Size()
+
+		fd := f.Decls[len(f.Decls)-1].(*ast.FuncDecl)
+		fdEnd := int(fd.End())
+
+		if fdEnd != tfEnd {
+			t.Errorf("%q: got fdEnd = %d; want %d (base = %d, size = %d)", src, fdEnd, tfEnd, tf.Base(), tf.Size())
+		}
+	}
+}