Provide stub so apps using goleak can build unchanged with tinygo.

leaks.go

@@ -18,6 +18,9 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+//go:build !tinygo
+// +build !tinygo
+
 package goleak
 
 import (

leaks_tinygo.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2017 Uber Technologies, Inc.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+//go:build tinygo
+// +build tinygo
+
+// goleak uses parts of go that are not yet supported by tinygo.
+// This file provides a placeholder to allow programs using goleak
+// to compile unchanged with tinygo before such support arrives.
+
+package goleak
+
+// TestingT is the minimal subset of testing.TB that we use.
+type TestingT interface {
+	Error(...interface{})
+}
+
+// VerifyNone marks the given TestingT as failed if any extra goroutines are
+// found by Find. This is a helper method to make it easier to integrate in
+// tests by doing:
+// 	defer VerifyNone(t)
+func VerifyNone(t TestingT, options ...Option) {
+	// Stub until ported to tinygo
+}

testmain.go

@@ -18,6 +18,9 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+//go:build !tinygo
+// +build !tinygo
+
 package goleak
 
 import (