1 files changed, 37 insertions, 0 deletions
diff --git a/test/fixedbugs/issue21879.go b/test/fixedbugs/issue21879.go
new file mode 100644
index 0000000..1029ca0
--- /dev/null
+++ b/test/fixedbugs/issue21879.go
@@ -0,0 +1,37 @@
+// run
+
+// Copyright 2017 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 (
+	"runtime"
+)
+
+func main() {
+	println(caller().frame.Function)
+
+	// Used to erroneously print "main.call.name" instead of
+	// "main.main".
+	println(caller().name())
+}
+
+func caller() call {
+	var pcs [3]uintptr
+	n := runtime.Callers(1, pcs[:])
+	frames := runtime.CallersFrames(pcs[:n])
+	frame, _ := frames.Next()
+	frame, _ = frames.Next()
+
+	return call{frame: frame}
+}
+
+type call struct {
+	frame runtime.Frame
+}
+
+func (c call) name() string {
+	return c.frame.Function
+}