[dev.regabi] test: add a test for inlining closures

Add a test case for issue 43818. We don't want to mark as inlinable a
function with a closure that has an operation (such as OSELRECV2) that
we don't currently support for exporting. This test case fails to
compile without the fix for #43818.

Updates #43818

Change-Id: Ief322a14aefaefc6913c40a6b8505214bd622fda
Reviewed-on: https://go-review.googlesource.com/c/go/+/288392
Run-TryBot: Dan Scales <danscales@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>

diff --git a/test/closure7.go b/test/closure7.go
new file mode 100644 (file)
index 0000000..823333f
--- /dev/null
+++ b/test/closure7.go
@@ -0,0 +1,28 @@
+// run
+
+// Copyright 2020 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
+
+func g(f func()) {
+}
+
+// Must have exportable name
+func F() {
+       g(func() {
+               ch := make(chan int)
+               for {
+                       select {
+                       case <-ch:
+                               return
+                       default:
+                       }
+               }
+       })
+}
+
+func main() {
+       F()
+}