1 files changed, 51 insertions, 0 deletions
diff --git a/test/fixedbugs/issue25897a.go b/test/fixedbugs/issue25897a.go
new file mode 100644
index 0000000..d4fa6c8
--- /dev/null
+++ b/test/fixedbugs/issue25897a.go
@@ -0,0 +1,51 @@
+// run
+
+// 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.
+
+// Make sure the runtime can scan args of an unstarted goroutine
+// which starts with a reflect-generated function.
+
+package main
+
+import (
+	"reflect"
+	"runtime"
+)
+
+const N = 100
+
+func main() {
+	runtime.GOMAXPROCS(1)
+	// Run GC in a loop. This makes it more likely GC will catch
+	// an unstarted goroutine then if we were to GC after kicking
+	// everything off.
+	go func() {
+		for {
+			runtime.GC()
+		}
+	}()
+	c := make(chan bool, N)
+	for i := 0; i < N; i++ {
+		// Test both with an argument and without because this
+		// affects whether the compiler needs to generate a
+		// wrapper closure for the "go" statement.
+		f := reflect.MakeFunc(reflect.TypeOf(((func(*int))(nil))),
+			func(args []reflect.Value) []reflect.Value {
+				c <- true
+				return nil
+			}).Interface().(func(*int))
+		go f(nil)
+
+		g := reflect.MakeFunc(reflect.TypeOf(((func())(nil))),
+			func(args []reflect.Value) []reflect.Value {
+				c <- true
+				return nil
+			}).Interface().(func())
+		go g()
+	}
+	for i := 0; i < N*2; i++ {
+		<-c
+	}
+}